diff --git a/backend/src/db/migrations/20250710022434_add-index-for-access-token.ts b/backend/src/db/migrations/20250710022434_add-index-for-access-token.ts
index 7f85af74d..a0215891d 100644
--- a/backend/src/db/migrations/20250710022434_add-index-for-access-token.ts
+++ b/backend/src/db/migrations/20250710022434_add-index-for-access-token.ts
@@ -5,19 +5,20 @@ import { TableName } from "../schemas";
 const MIGRATION_TIMEOUT = 30 * 60 * 1000; // 30 minutes
 
 export async function up(knex: Knex): Promise<void> {
-  const result = await knex.raw('SHOW statement_timeout');
+  const result = await knex.raw("SHOW statement_timeout");
   const originalTimeout = result.rows[0].statement_timeout;
-  
+
   try {
     await knex.raw(`SET statement_timeout = ${MIGRATION_TIMEOUT}`);
 
+    // iat means IdentityAccessToken
     await knex.raw(`
-          CREATE INDEX CONCURRENTLY IF NOT EXISTS ${TableName.IdentityAccessToken}_identityid_index 
+          CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_iat_identity_id 
           ON ${TableName.IdentityAccessToken} ("identityId")
         `);
 
     await knex.raw(`
-          CREATE INDEX CONCURRENTLY IF NOT EXISTS ${TableName.IdentityAccessToken}_identityuaclientsecretid_index 
+          CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_iat_ua_client_secret_id 
           ON ${TableName.IdentityAccessToken} ("identityUAClientSecretId")
         `);
   } finally {
@@ -26,22 +27,22 @@ export async function up(knex: Knex): Promise<void> {
 }
 
 export async function down(knex: Knex): Promise<void> {
-  const result = await knex.raw('SHOW statement_timeout');
+  const result = await knex.raw("SHOW statement_timeout");
   const originalTimeout = result.rows[0].statement_timeout;
-  
+
   try {
     await knex.raw(`SET statement_timeout = ${MIGRATION_TIMEOUT}`);
 
     await knex.raw(`
-          DROP INDEX IF EXISTS ${TableName.IdentityAccessToken}_identityid_index
+          DROP INDEX IF EXISTS idx_iat_identity_id
         `);
 
     await knex.raw(`
-          DROP INDEX IF EXISTS ${TableName.IdentityAccessToken}_identityuaclientsecretid_index
+          DROP INDEX IF EXISTS idx_iat_ua_client_secret_id
         `);
   } finally {
     await knex.raw(`SET statement_timeout = '${originalTimeout}'`);
   }
 }
 
-export const config = { transaction: false };
\ No newline at end of file
+export const config = { transaction: false };