diff --git a/src/tenants/tenants.service.ts b/src/tenants/tenants.service.ts
index 7249c88..3d48abb 100644
--- a/src/tenants/tenants.service.ts
+++ b/src/tenants/tenants.service.ts
@@ -437,11 +437,12 @@ export class TenantsService {
     if (!(error instanceof Prisma.PrismaClientKnownRequestError)) {
       return;
     }
-    if (error.code !== 'P2002') {
+    const prismaError = error;
+    if (prismaError.code !== 'P2002') {
       return;
     }
-    const targets = Array.isArray(error.meta?.target)
-      ? (error.meta.target as string[])
+    const targets = Array.isArray(prismaError.meta?.target)
+      ? (prismaError.meta.target as string[])
       : [];
     if (targets.includes('slug')) {
       throw new ConflictException('slug تکراری است — این slug قبلاً برای نسخه دیگری ثبت شده');