MC-42288: Coupon codes for existing cart price rule are not generated

- Change error message

Author: loganadhan-palanisamy

app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/Generate.php

@@ -83,7 +83,7 @@ public function execute()
         } elseif ((int) $rule->getCouponType() !== \Magento\SalesRule\Model\Rule::COUPON_TYPE_AUTO
             && !$rule->getUseAutoGeneration()) {
             $result['error'] =
-                __('Rule is not saved with auto generate option enabled. Please save the rule and try again.');
+                __('The rule coupon settings changed. Please save the rule before using auto-generation.');
         } else {
             try {
                 $data = $this->getRequest()->getParams();

app/code/Magento/SalesRule/Test/Mftf/Test/AdminBlockCouponGeneratesUntilCartPriceRuleSavedWithSpecificCouponTypeAndAutoGenerationTickedTest.xml

@@ -51,7 +51,7 @@
                           stepKey="clickManageCouponCodes"/>
         <fillField selector="{{AdminCartPriceRulesFormSection.couponQty}}" userInput="1" stepKey="fillFieldCouponQty"/>
         <click selector="{{AdminCartPriceRulesFormSection.generateCouponsButton}}" stepKey="clickGenerateCoupon"/>
-        <see selector="{{AdminCartPriceRulesFormSection.modalMessage}}" userInput="Rule is not saved with auto generate option enabled. Please save the rule and try again."
+        <see selector="{{AdminCartPriceRulesFormSection.modalMessage}}" userInput="The rule coupon settings changed. Please save the rule before using auto-generation."
              stepKey="seeModalMessage"/>
     </test>
 </tests>

app/code/Magento/SalesRule/Test/Unit/Controller/Adminhtml/Promo/Quote/GenerateTest.php

@@ -319,7 +319,7 @@ public function testExecuteWithCouponTypeNotAutoAndAutoGenerationNotEnabled()
             ->method('jsonEncode')
             ->with([
                 'error' =>
-                    __('Rule is not saved with auto generate option enabled. Please save the rule and try again.')
+                    __('The rule coupon settings changed. Please save the rule before using auto-generation.')
             ]);
         $this->model->execute();
     }