diff --git a/src/app/api/auth/sso/route.ts b/src/app/api/auth/sso/route.ts
index f82228695..bf4bc2209 100644
--- a/src/app/api/auth/sso/route.ts
+++ b/src/app/api/auth/sso/route.ts
@@ -11,9 +11,7 @@ export async function POST(request: Request) {
   }
 
   if (!redis.enabled) {
-    return serverError({
-      message: 'Redis is disabled',
-    });
+    return serverError('Redis is disabled');
   }
 
   const token = await saveAuth({ userId: auth.user.id }, 86400);
diff --git a/src/app/api/record/route.ts b/src/app/api/record/route.ts
index ade6aa0c2..479bba1c8 100644
--- a/src/app/api/record/route.ts
+++ b/src/app/api/record/route.ts
@@ -244,11 +244,6 @@ export async function POST(request: Request) {
 
     return json({ ok: true });
   } catch (e) {
-    const error = serializeError(e);
-
-    // eslint-disable-next-line no-console
-    console.log(error);
-
-    return serverError({ errorObject: error });
+    return serverError(e);
   }
 }
diff --git a/src/app/api/send/route.ts b/src/app/api/send/route.ts
index 532836d97..6d2086176 100644
--- a/src/app/api/send/route.ts
+++ b/src/app/api/send/route.ts
@@ -1,6 +1,5 @@
 import { startOfHour } from 'date-fns';
 import { isbot } from 'isbot';
-import { serializeError } from 'serialize-error';
 import { z } from 'zod';
 import clickhouse from '@/lib/clickhouse';
 import { CACHE_TOKEN_TYPE, COLLECTION_TYPE, EVENT_TYPE } from '@/lib/constants';
@@ -24,13 +23,10 @@ interface Cache {
 // Reject strings whose first character is a spreadsheet formula trigger to
 // prevent CSV formula injection in analytics exports (defense-in-depth).
 const FORMULA_TRIGGER_RE = /^[=+\-@\t\r]/;
-const safeStringParam = (maxLen: number) =>
-  z
-    .string()
-    .max(maxLen)
-    .refine(val => !FORMULA_TRIGGER_RE.test(val), {
-      message: 'Value must not start with =, +, -, @, tab, or carriage return',
-    });
+const safeStringParam = () =>
+  z.string().refine(val => !FORMULA_TRIGGER_RE.test(val), {
+    message: 'Value must not start with =, +, -, @, tab, or carriage return',
+  });
 
 const schema = z.object({
   type: z.enum(['event', 'identify', 'performance']),
@@ -40,21 +36,21 @@ const schema = z.object({
       link: z.uuid().optional(),
       pixel: z.uuid().optional(),
       data: anyObjectParam.optional(),
-      hostname: z.string().max(100).optional(),
-      language: z.string().max(35).optional(),
+      hostname: z.string().optional(),
+      language: z.string().optional(),
       referrer: urlOrPathParam.optional(),
-      screen: z.string().max(11).optional(),
-      title: z.string().max(500).optional(),
+      screen: z.string().optional(),
+      title: z.string().optional(),
       url: urlOrPathParam.optional(),
-      name: safeStringParam(50).optional(),
-      tag: safeStringParam(50).optional(),
+      name: safeStringParam().optional(),
+      tag: safeStringParam().optional(),
       ip: z.string().optional(),
       userAgent: z.string().optional(),
       timestamp: z.coerce.number().int().optional(),
-      id: z.string().max(50).optional(),
-      browser: z.string().max(20).optional(),
-      os: z.string().max(20).optional(),
-      device: z.string().max(20).optional(),
+      id: z.string().optional(),
+      browser: z.string().optional(),
+      os: z.string().optional(),
+      device: z.string().optional(),
       lcp: z.number().nonnegative().max(60000).optional(),
       inp: z.number().nonnegative().max(60000).optional(),
       cls: z.number().nonnegative().max(100).optional(),
@@ -326,11 +322,6 @@ export async function POST(request: Request) {
 
     return json({ cache: token, sessionId, visitId });
   } catch (e) {
-    const error = serializeError(e);
-
-    // eslint-disable-next-line no-console
-    console.log(error);
-
-    return serverError({ errorObject: error });
+    return serverError(e);
   }
 }
diff --git a/src/lib/constants.ts b/src/lib/constants.ts
index 5b0ce277c..0d58eefa0 100644
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -268,12 +268,26 @@ export const SHARE_ID_REGEX = /^[a-zA-Z0-9]{8,50}$/;
 export const DATETIME_REGEX =
   /^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]{3})?(Z|\+[0-9]{2}:[0-9]{2})?$/;
 
-export const URL_LENGTH = 500;
-export const PAGE_TITLE_LENGTH = 500;
-export const EVENT_NAME_LENGTH = 50;
-export const TAG_LENGTH = 50;
-export const HOSTNAME_LENGTH = 100;
-export const FIELD_VALUE_LENGTH = 255;
+export const FIELD_LENGTH = {
+  browser: 20,
+  os: 20,
+  device: 20,
+  screen: 11,
+  language: 35,
+  country: 2,
+  region: 20,
+  city: 50,
+  distinctId: 50,
+  url: 500,
+  pageTitle: 500,
+  eventName: 50,
+  tag: 50,
+  hostname: 100,
+  fieldValue: 255,
+  dataKey: 500,
+  stringValue: 500,
+  currency: 10,
+} as const;
 
 export const UTM_PARAMS = ['utm_campaign', 'utm_content', 'utm_medium', 'utm_source', 'utm_term'];
 
diff --git a/src/lib/data.test.ts b/src/lib/data.test.ts
new file mode 100644
index 000000000..c2000d774
--- /dev/null
+++ b/src/lib/data.test.ts
@@ -0,0 +1,17 @@
+import { describe, expect, test } from 'vitest';
+import { DATA_TYPE, FIELD_LENGTH } from './constants';
+import { getStoredStringValue } from './data';
+
+describe('getStoredStringValue', () => {
+  test('truncates oversized string values to the storage limit', () => {
+    expect(getStoredStringValue('x'.repeat(FIELD_LENGTH.stringValue + 25), DATA_TYPE.string)).toHaveLength(
+      FIELD_LENGTH.stringValue,
+    );
+  });
+
+  test('drops oversized array payloads instead of storing invalid truncated JSON', () => {
+    const oversizedArray = JSON.stringify([`x${'y'.repeat(FIELD_LENGTH.stringValue)}`]);
+
+    expect(getStoredStringValue(oversizedArray, DATA_TYPE.array)).toBeNull();
+  });
+});
diff --git a/src/lib/data.ts b/src/lib/data.ts
index 07eae52a5..70cbdfed8 100644
--- a/src/lib/data.ts
+++ b/src/lib/data.ts
@@ -1,4 +1,5 @@
-import { DATA_TYPE, DATETIME_REGEX } from './constants';
+import { DATA_TYPE, DATETIME_REGEX, FIELD_LENGTH } from './constants';
+import { truncateString } from './format';
 import type { DynamicDataType } from './types';
 
 export interface KeyValueData {
@@ -49,6 +50,16 @@ export function getStringValue(value: string, dataType: number) {
   return value;
 }
 
+export function getStoredStringValue(value: string, dataType: number) {
+  const stringValue = getStringValue(value, dataType);
+
+  if (dataType === DATA_TYPE.array && stringValue.length > FIELD_LENGTH.stringValue) {
+    return null;
+  }
+
+  return truncateString(stringValue, FIELD_LENGTH.stringValue);
+}
+
 export function createKeyValue(key: string, value: any): KeyValueData {
   const type = getDataType(value);
   let dataType: DynamicDataType;
diff --git a/src/lib/format.test.ts b/src/lib/format.test.ts
index edf6b64ff..4f9b192a2 100644
--- a/src/lib/format.test.ts
+++ b/src/lib/format.test.ts
@@ -37,3 +37,8 @@ test('stringToColor', () => {
   expect(format.stringToColor('hello')).toBe('#d218e9');
   expect(format.stringToColor('goodbye')).toBe('#11e956');
 });
+
+test('truncateString', () => {
+  expect(format.truncateString('hello', 3)).toBe('hel');
+  expect(format.truncateString(undefined, 3)).toBeUndefined();
+});
diff --git a/src/lib/format.ts b/src/lib/format.ts
index 035a18111..a92fb4423 100644
--- a/src/lib/format.ts
+++ b/src/lib/format.ts
@@ -118,3 +118,10 @@ export function formatLongCurrency(value: number, currency: string, locale = 'en
 
   return formatCurrency(n, currency, locale);
 }
+
+export function truncateString<T extends string | null | undefined>(
+  value: T,
+  maxLength: number,
+): T extends string ? string : T {
+  return (value ? value.substring(0, maxLength) : value) as T extends string ? string : T;
+}
diff --git a/src/lib/response.test.ts b/src/lib/response.test.ts
new file mode 100644
index 000000000..594ed3095
--- /dev/null
+++ b/src/lib/response.test.ts
@@ -0,0 +1,32 @@
+import { describe, expect, test, vi } from 'vitest';
+import { serverError } from './response';
+
+describe('serverError', () => {
+  test('does not expose internal error details in the response body', async () => {
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+
+    const response = serverError(new Error('database exploded'));
+
+    expect(await response.json()).toEqual({
+      error: {
+        message: 'Server error',
+        code: 'server-error',
+        status: 500,
+      },
+    });
+
+    logSpy.mockRestore();
+  });
+
+  test('allows intentional server error messages', async () => {
+    const response = serverError('Redis is disabled');
+
+    expect(await response.json()).toEqual({
+      error: {
+        message: 'Redis is disabled',
+        code: 'server-error',
+        status: 500,
+      },
+    });
+  });
+});
diff --git a/src/lib/response.ts b/src/lib/response.ts
index 587802619..4c3f071a7 100644
--- a/src/lib/response.ts
+++ b/src/lib/response.ts
@@ -1,3 +1,5 @@
+import { serializeError } from 'serialize-error';
+
 export function ok() {
   return Response.json({ ok: true });
 }
@@ -52,14 +54,18 @@ export function notFound(error?: Record<string, any>) {
   );
 }
 
-export function serverError(error?: Record<string, any>) {
+export function serverError(error?: unknown) {
+  if (error && typeof error !== 'string') {
+    // eslint-disable-next-line no-console
+    console.log(serializeError(error));
+  }
+
   return Response.json(
     {
       error: {
-        message: 'Server error',
+        message: typeof error === 'string' ? error : 'Server error',
         code: 'server-error',
         status: 500,
-        ...error,
       },
     },
     { status: 500 },
diff --git a/src/queries/sql/events/saveEvent.ts b/src/queries/sql/events/saveEvent.ts
index e48e88fe8..b274a1b6e 100644
--- a/src/queries/sql/events/saveEvent.ts
+++ b/src/queries/sql/events/saveEvent.ts
@@ -1,14 +1,8 @@
 import clickhouse from '@/lib/clickhouse';
-import {
-  EVENT_NAME_LENGTH,
-  FIELD_VALUE_LENGTH,
-  HOSTNAME_LENGTH,
-  PAGE_TITLE_LENGTH,
-  TAG_LENGTH,
-  URL_LENGTH,
-} from '@/lib/constants';
+import { FIELD_LENGTH } from '@/lib/constants';
 import { uuid } from '@/lib/crypto';
 import { CLICKHOUSE, PRISMA, runQuery } from '@/lib/db';
+import { truncateString } from '@/lib/format';
 import kafka from '@/lib/kafka';
 import prisma from '@/lib/prisma';
 import { saveEventData } from './saveEventData';
@@ -76,10 +70,6 @@ export async function saveEvent(args: SaveEventArgs) {
   });
 }
 
-function truncate(value: string | null | undefined, maxLength: number) {
-  return value ? value.substring(0, maxLength) : value;
-}
-
 async function relationalQuery({
   websiteId,
   sessionId,
@@ -121,27 +111,27 @@ async function relationalQuery({
       websiteId,
       sessionId,
       visitId,
-      urlPath: truncate(urlPath, URL_LENGTH),
-      urlQuery: truncate(urlQuery, URL_LENGTH),
-      utmSource: truncate(utmSource, FIELD_VALUE_LENGTH),
-      utmMedium: truncate(utmMedium, FIELD_VALUE_LENGTH),
-      utmCampaign: truncate(utmCampaign, FIELD_VALUE_LENGTH),
-      utmContent: truncate(utmContent, FIELD_VALUE_LENGTH),
-      utmTerm: truncate(utmTerm, FIELD_VALUE_LENGTH),
-      referrerPath: truncate(referrerPath, URL_LENGTH),
-      referrerQuery: truncate(referrerQuery, URL_LENGTH),
-      referrerDomain: truncate(referrerDomain, URL_LENGTH),
-      pageTitle: truncate(pageTitle, PAGE_TITLE_LENGTH),
-      gclid: truncate(gclid, FIELD_VALUE_LENGTH),
-      fbclid: truncate(fbclid, FIELD_VALUE_LENGTH),
-      msclkid: truncate(msclkid, FIELD_VALUE_LENGTH),
-      ttclid: truncate(ttclid, FIELD_VALUE_LENGTH),
-      lifatid: truncate(lifatid, FIELD_VALUE_LENGTH),
-      twclid: truncate(twclid, FIELD_VALUE_LENGTH),
+      urlPath: truncateString(urlPath, FIELD_LENGTH.url),
+      urlQuery: truncateString(urlQuery, FIELD_LENGTH.url),
+      utmSource: truncateString(utmSource, FIELD_LENGTH.fieldValue),
+      utmMedium: truncateString(utmMedium, FIELD_LENGTH.fieldValue),
+      utmCampaign: truncateString(utmCampaign, FIELD_LENGTH.fieldValue),
+      utmContent: truncateString(utmContent, FIELD_LENGTH.fieldValue),
+      utmTerm: truncateString(utmTerm, FIELD_LENGTH.fieldValue),
+      referrerPath: truncateString(referrerPath, FIELD_LENGTH.url),
+      referrerQuery: truncateString(referrerQuery, FIELD_LENGTH.url),
+      referrerDomain: truncateString(referrerDomain, FIELD_LENGTH.url),
+      pageTitle: truncateString(pageTitle, FIELD_LENGTH.pageTitle),
+      gclid: truncateString(gclid, FIELD_LENGTH.fieldValue),
+      fbclid: truncateString(fbclid, FIELD_LENGTH.fieldValue),
+      msclkid: truncateString(msclkid, FIELD_LENGTH.fieldValue),
+      ttclid: truncateString(ttclid, FIELD_LENGTH.fieldValue),
+      lifatid: truncateString(lifatid, FIELD_LENGTH.fieldValue),
+      twclid: truncateString(twclid, FIELD_LENGTH.fieldValue),
       eventType,
-      eventName: truncate(eventName, EVENT_NAME_LENGTH) ?? null,
-      tag: truncate(tag, TAG_LENGTH),
-      hostname: truncate(hostname, HOSTNAME_LENGTH),
+      eventName: truncateString(eventName, FIELD_LENGTH.eventName) ?? null,
+      tag: truncateString(tag, FIELD_LENGTH.tag),
+      hostname: truncateString(hostname, FIELD_LENGTH.hostname),
       lcp,
       inp,
       cls,
@@ -156,8 +146,8 @@ async function relationalQuery({
       websiteId,
       sessionId,
       eventId: websiteEventId,
-      urlPath: truncate(urlPath, URL_LENGTH),
-      eventName: truncate(eventName, EVENT_NAME_LENGTH),
+      urlPath: truncateString(urlPath, FIELD_LENGTH.url),
+      eventName: truncateString(eventName, FIELD_LENGTH.eventName),
       eventData,
       createdAt,
     });
@@ -169,7 +159,7 @@ async function relationalQuery({
         websiteId,
         sessionId,
         eventId: websiteEventId,
-        eventName: truncate(eventName, EVENT_NAME_LENGTH),
+        eventName: truncateString(eventName, FIELD_LENGTH.eventName),
         currency,
         revenue,
         createdAt,
@@ -229,37 +219,40 @@ async function clickhouseQuery({
     session_id: sessionId,
     visit_id: visitId,
     event_id: eventId,
-    country: country,
-    region: country && region ? (region.includes('-') ? region : `${country}-${region}`) : null,
-    city: city,
-    url_path: truncate(urlPath, URL_LENGTH),
-    url_query: truncate(urlQuery, URL_LENGTH),
-    utm_source: truncate(utmSource, FIELD_VALUE_LENGTH),
-    utm_medium: truncate(utmMedium, FIELD_VALUE_LENGTH),
-    utm_campaign: truncate(utmCampaign, FIELD_VALUE_LENGTH),
-    utm_content: truncate(utmContent, FIELD_VALUE_LENGTH),
-    utm_term: truncate(utmTerm, FIELD_VALUE_LENGTH),
-    referrer_path: truncate(referrerPath, URL_LENGTH),
-    referrer_query: truncate(referrerQuery, URL_LENGTH),
-    referrer_domain: truncate(referrerDomain, URL_LENGTH),
-    page_title: truncate(pageTitle, PAGE_TITLE_LENGTH),
-    gclid: truncate(gclid, FIELD_VALUE_LENGTH),
-    fbclid: truncate(fbclid, FIELD_VALUE_LENGTH),
-    msclkid: truncate(msclkid, FIELD_VALUE_LENGTH),
-    ttclid: truncate(ttclid, FIELD_VALUE_LENGTH),
-    li_fat_id: truncate(lifatid, FIELD_VALUE_LENGTH),
-    twclid: truncate(twclid, FIELD_VALUE_LENGTH),
+    region: truncateString(
+      country && region ? (region.includes('-') ? region : `${country}-${region}`) : null,
+      FIELD_LENGTH.region,
+    ),
+    city: truncateString(city, FIELD_LENGTH.city),
+    url_path: truncateString(urlPath, FIELD_LENGTH.url),
+    url_query: truncateString(urlQuery, FIELD_LENGTH.url),
+    utm_source: truncateString(utmSource, FIELD_LENGTH.fieldValue),
+    utm_medium: truncateString(utmMedium, FIELD_LENGTH.fieldValue),
+    utm_campaign: truncateString(utmCampaign, FIELD_LENGTH.fieldValue),
+    utm_content: truncateString(utmContent, FIELD_LENGTH.fieldValue),
+    utm_term: truncateString(utmTerm, FIELD_LENGTH.fieldValue),
+    referrer_path: truncateString(referrerPath, FIELD_LENGTH.url),
+    referrer_query: truncateString(referrerQuery, FIELD_LENGTH.url),
+    referrer_domain: truncateString(referrerDomain, FIELD_LENGTH.url),
+    page_title: truncateString(pageTitle, FIELD_LENGTH.pageTitle),
+    gclid: truncateString(gclid, FIELD_LENGTH.fieldValue),
+    fbclid: truncateString(fbclid, FIELD_LENGTH.fieldValue),
+    msclkid: truncateString(msclkid, FIELD_LENGTH.fieldValue),
+    ttclid: truncateString(ttclid, FIELD_LENGTH.fieldValue),
+    li_fat_id: truncateString(lifatid, FIELD_LENGTH.fieldValue),
+    twclid: truncateString(twclid, FIELD_LENGTH.fieldValue),
     event_type: eventType,
-    event_name: truncate(eventName, EVENT_NAME_LENGTH) ?? null,
-    tag: truncate(tag, TAG_LENGTH),
-    distinct_id: distinctId,
+    event_name: truncateString(eventName, FIELD_LENGTH.eventName) ?? null,
+    tag: truncateString(tag, FIELD_LENGTH.tag),
+    distinct_id: truncateString(distinctId, FIELD_LENGTH.distinctId),
     created_at: getUTCString(createdAt),
-    browser: browser,
-    os: os,
-    device: device,
-    screen: screen,
-    language: language,
-    hostname: truncate(hostname, HOSTNAME_LENGTH),
+    browser: truncateString(browser, FIELD_LENGTH.browser),
+    os: truncateString(os, FIELD_LENGTH.os),
+    device: truncateString(device, FIELD_LENGTH.device),
+    screen: truncateString(screen, FIELD_LENGTH.screen),
+    language: truncateString(language, FIELD_LENGTH.language),
+    hostname: truncateString(hostname, FIELD_LENGTH.hostname),
+    country: truncateString(country, FIELD_LENGTH.country),
     lcp: lcp,
     inp: inp,
     cls: cls,
@@ -278,8 +271,8 @@ async function clickhouseQuery({
       websiteId,
       sessionId,
       eventId,
-      urlPath: truncate(urlPath, URL_LENGTH),
-      eventName: truncate(eventName, EVENT_NAME_LENGTH),
+      urlPath: truncateString(urlPath, FIELD_LENGTH.url),
+      eventName: truncateString(eventName, FIELD_LENGTH.eventName),
       eventData,
       createdAt,
     });
diff --git a/src/queries/sql/events/saveEventData.ts b/src/queries/sql/events/saveEventData.ts
index b8b0e02fc..589e8ce6a 100644
--- a/src/queries/sql/events/saveEventData.ts
+++ b/src/queries/sql/events/saveEventData.ts
@@ -1,8 +1,9 @@
 import clickhouse from '@/lib/clickhouse';
-import { DATA_TYPE } from '@/lib/constants';
+import { DATA_TYPE, FIELD_LENGTH } from '@/lib/constants';
 import { uuid } from '@/lib/crypto';
-import { flattenJSON, getStringValue } from '@/lib/data';
+import { flattenJSON, getStoredStringValue } from '@/lib/data';
 import { CLICKHOUSE, PRISMA, runQuery } from '@/lib/db';
+import { truncateString } from '@/lib/format';
 import kafka from '@/lib/kafka';
 import prisma from '@/lib/prisma';
 import type { DynamicData } from '@/lib/types';
@@ -34,8 +35,8 @@ async function relationalQuery(data: SaveEventDataArgs) {
     id: uuid(),
     websiteEventId: eventId,
     websiteId,
-    dataKey: a.key,
-    stringValue: getStringValue(a.value, a.dataType),
+    dataKey: truncateString(a.key, FIELD_LENGTH.dataKey),
+    stringValue: getStoredStringValue(a.value, a.dataType),
     numberValue: a.dataType === DATA_TYPE.number ? a.value : null,
     dateValue: a.dataType === DATA_TYPE.date ? new Date(a.value) : null,
     dataType: a.dataType,
@@ -60,11 +61,11 @@ async function clickhouseQuery(data: SaveEventDataArgs) {
       website_id: websiteId,
       session_id: sessionId,
       event_id: eventId,
-      url_path: urlPath,
-      event_name: eventName,
-      data_key: key,
+      url_path: truncateString(urlPath, FIELD_LENGTH.url),
+      event_name: truncateString(eventName, FIELD_LENGTH.eventName),
+      data_key: truncateString(key, FIELD_LENGTH.dataKey),
       data_type: dataType,
-      string_value: getStringValue(value, dataType),
+      string_value: getStoredStringValue(value, dataType),
       number_value: dataType === DATA_TYPE.number ? value : null,
       date_value: dataType === DATA_TYPE.date ? getUTCString(value) : null,
       created_at: getUTCString(createdAt),
diff --git a/src/queries/sql/events/saveRevenue.ts b/src/queries/sql/events/saveRevenue.ts
index a38df83a0..ae6e75ad4 100644
--- a/src/queries/sql/events/saveRevenue.ts
+++ b/src/queries/sql/events/saveRevenue.ts
@@ -1,5 +1,7 @@
+import { FIELD_LENGTH } from '@/lib/constants';
 import { uuid } from '@/lib/crypto';
 import { PRISMA, runQuery } from '@/lib/db';
+import { truncateString } from '@/lib/format';
 import prisma from '@/lib/prisma';
 
 export interface SaveRevenueArgs {
@@ -27,8 +29,8 @@ async function relationalQuery(data: SaveRevenueArgs) {
       websiteId,
       sessionId,
       eventId,
-      eventName,
-      currency,
+      eventName: truncateString(eventName, FIELD_LENGTH.eventName),
+      currency: truncateString(currency, FIELD_LENGTH.currency),
       revenue,
       createdAt,
     },
diff --git a/src/queries/sql/sessions/createSession.ts b/src/queries/sql/sessions/createSession.ts
index 8d07a5540..d37d11e4a 100644
--- a/src/queries/sql/sessions/createSession.ts
+++ b/src/queries/sql/sessions/createSession.ts
@@ -1,10 +1,24 @@
 import type { Prisma } from '@/generated/prisma/client';
+import { FIELD_LENGTH } from '@/lib/constants';
+import { truncateString } from '@/lib/format';
 import prisma from '@/lib/prisma';
 
 const FUNCTION_NAME = 'createSession';
 
 export async function createSession(data: Prisma.SessionCreateInput) {
   const { rawQuery } = prisma;
+  const normalizedData: Prisma.SessionCreateInput = {
+    ...data,
+    browser: truncateString(data.browser, FIELD_LENGTH.browser),
+    os: truncateString(data.os, FIELD_LENGTH.os),
+    device: truncateString(data.device, FIELD_LENGTH.device),
+    screen: truncateString(data.screen, FIELD_LENGTH.screen),
+    language: truncateString(data.language, FIELD_LENGTH.language),
+    country: truncateString(data.country, FIELD_LENGTH.country),
+    region: truncateString(data.region, FIELD_LENGTH.region),
+    city: truncateString(data.city, FIELD_LENGTH.city),
+    distinctId: truncateString(data.distinctId, FIELD_LENGTH.distinctId),
+  };
 
   await rawQuery(
     `
@@ -38,7 +52,7 @@ export async function createSession(data: Prisma.SessionCreateInput) {
     )
     on conflict (session_id) do nothing
     `,
-    data,
+    normalizedData,
     FUNCTION_NAME,
   );
 }
diff --git a/src/queries/sql/sessions/saveSessionData.ts b/src/queries/sql/sessions/saveSessionData.ts
index b1a63ed3e..ec9020256 100644
--- a/src/queries/sql/sessions/saveSessionData.ts
+++ b/src/queries/sql/sessions/saveSessionData.ts
@@ -1,8 +1,9 @@
 import clickhouse from '@/lib/clickhouse';
-import { DATA_TYPE } from '@/lib/constants';
+import { DATA_TYPE, FIELD_LENGTH } from '@/lib/constants';
 import { uuid } from '@/lib/crypto';
-import { flattenJSON, getStringValue } from '@/lib/data';
+import { flattenJSON, getStoredStringValue } from '@/lib/data';
 import { CLICKHOUSE, PRISMA, runQuery } from '@/lib/db';
+import { truncateString } from '@/lib/format';
 import kafka from '@/lib/kafka';
 import prisma from '@/lib/prisma';
 import type { DynamicData } from '@/lib/types';
@@ -32,17 +33,18 @@ export async function relationalQuery({
   const { client } = prisma;
 
   const jsonKeys = flattenJSON(sessionData);
+  const normalizedDistinctId = truncateString(distinctId, FIELD_LENGTH.distinctId);
 
   const flattenedData = jsonKeys.map(a => ({
     id: uuid(),
     websiteId,
     sessionId,
-    dataKey: a.key,
-    stringValue: getStringValue(a.value, a.dataType),
+    dataKey: truncateString(a.key, FIELD_LENGTH.dataKey),
+    stringValue: getStoredStringValue(a.value, a.dataType),
     numberValue: a.dataType === DATA_TYPE.number ? a.value : null,
     dateValue: a.dataType === DATA_TYPE.date ? new Date(a.value) : null,
     dataType: a.dataType,
-    distinctId,
+    distinctId: normalizedDistinctId,
     createdAt,
   }));
 
@@ -79,17 +81,18 @@ async function clickhouseQuery({
   const { sendMessage } = kafka;
 
   const jsonKeys = flattenJSON(sessionData);
+  const normalizedDistinctId = truncateString(distinctId, FIELD_LENGTH.distinctId);
 
   const messages = jsonKeys.map(({ key, value, dataType }) => {
     return {
       website_id: websiteId,
       session_id: sessionId,
-      data_key: key,
+      data_key: truncateString(key, FIELD_LENGTH.dataKey),
       data_type: dataType,
-      string_value: getStringValue(value, dataType),
+      string_value: getStoredStringValue(value, dataType),
       number_value: dataType === DATA_TYPE.number ? value : null,
       date_value: dataType === DATA_TYPE.date ? getUTCString(value) : null,
-      distinct_id: distinctId,
+      distinct_id: normalizedDistinctId,
       created_at: getUTCString(createdAt),
     };
   });