diff --git a/packages/Webkul/CartRule/src/Http/Controllers/CartRuleController.php b/packages/Webkul/CartRule/src/Http/Controllers/CartRuleController.php
index 3e78c957a..b69d6edc7 100644
--- a/packages/Webkul/CartRule/src/Http/Controllers/CartRuleController.php
+++ b/packages/Webkul/CartRule/src/Http/Controllers/CartRuleController.php
@@ -119,7 +119,7 @@ class CartRuleController extends Controller
             'customer_groups'     => 'required|array|min:1',
             'coupon_type'         => 'required',
             'use_auto_generation' => 'required_if:coupon_type,==,1',
-            'coupon_code'         => 'required_if:use_auto_generation,==,0',
+            'coupon_code'         => 'required_if:use_auto_generation,==,0|unique:cart_rule_coupons,code',
             'starts_from'         => 'nullable|date',
             'ends_till'           => 'nullable|date|after_or_equal:starts_from',
             'action_type'         => 'required',
@@ -169,7 +169,7 @@ class CartRuleController extends Controller
             'customer_groups'     => 'required|array|min:1',
             'coupon_type'         => 'required',
             'use_auto_generation' => 'required_if:coupon_type,==,1',
-            'coupon_code'         => 'required_if:use_auto_generation,==,0',
+            'coupon_code'         => 'required_if:use_auto_generation,==,0|unique:cart_rule_coupons,code',
             'starts_from'         => 'nullable|date',
             'ends_till'           => 'nullable|date|after_or_equal:starts_from',
             'action_type'         => 'required',