ACP2E-691: Order placed as logged in user has cancellation failed : Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails

Author: pradeep1819

app/code/Magento/SalesRule/Model/Coupon/Usage/Processor.php

@@ -132,6 +132,7 @@ private function updateRuleUsages(bool $isIncrement, int $ruleId): void
      * @param bool $isIncrement
      * @param int $ruleId
      * @param int $customerId
+     * @throws \Exception
      */
     private function updateCustomerRuleUsages(bool $isIncrement, int $ruleId, int $customerId): void
     {
@@ -144,6 +145,9 @@ private function updateCustomerRuleUsages(bool $isIncrement, int $ruleId, int $c
         } elseif ($isIncrement) {
             $ruleCustomer->setCustomerId($customerId)->setRuleId($ruleId)->setTimesUsed(1);
         }
-        $ruleCustomer->save();
+
+        if ($ruleCustomer->hasData()) {
+            $ruleCustomer->save();
+        }
     }
 }