diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/AlertPluginInstanceServiceImpl.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/AlertPluginInstanceServiceImpl.java
index a77b3ae5f43215d021ca51ae18cf0d9331f1878a..dede2c173a566a1abc6414c4ec6503f0f267174d 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/AlertPluginInstanceServiceImpl.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/AlertPluginInstanceServiceImpl.java
@@ -131,6 +131,7 @@ public class AlertPluginInstanceServiceImpl extends BaseService implements Alert
         boolean hasAssociatedAlertGroup = checkHasAssociatedAlertGroup(String.valueOf(id));
         if (hasAssociatedAlertGroup) {
             putMsg(result, Status.DELETE_ALERT_PLUGIN_INSTANCE_ERROR_HAS_ALERT_GROUP_ASSOCIATED);
+            return result;
         }
 
         int i = alertPluginInstanceMapper.deleteById(id);