diff --git a/src/server/auth.ts b/src/server/auth.ts
index b1d7f7a..fb0d6f3 100644
--- a/src/server/auth.ts
+++ b/src/server/auth.ts
@@ -6,6 +6,7 @@ import {
   type DefaultSession,
 } from "next-auth";
 import KeycloakProvider from "next-auth/providers/keycloak";
+import { type AdapterAccount } from "next-auth/adapters";
 import { type JWT } from "next-auth/jwt";
 import { env } from "~/env.mjs";
 import { prisma } from "~/server/db";
@@ -43,6 +44,22 @@ declare module 'next-auth/jwt' {
   }
 }
 
+const adapter = PrismaAdapter(prisma);
+const originLinkAccount = adapter.linkAccount;
+
+/**
+ * This method override handles Keycloak response with fields we are not expecting,
+ * as a part of the response and we have no database fields for them,
+ * which caused error on writing data to database.
+ *
+ * @see https://stackoverflow.com/questions/69910570/prisma-with-next-auth-user-creation-fails-cause-of-keycloaks-api-response-key
+ */
+adapter.linkAccount = (account: AdapterAccount) => {
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  const { 'not-before-policy': _, refresh_expires_in, ...data } = account;
+  return originLinkAccount(data);
+}
+
 /**
  * Options for NextAuth.js used to configure adapters, providers, callbacks, etc.
  *
@@ -72,7 +89,7 @@ export const authOptions: NextAuthOptions = {
       return token
     },
   },
-  adapter: PrismaAdapter(prisma),
+  adapter: adapter,
   providers: [
     KeycloakProvider({
       clientId: env.KEYCLOAK_CLIENT_ID,