diff --git a/escheduler-server/src/main/java/cn/escheduler/server/utils/AlertManager.java b/escheduler-server/src/main/java/cn/escheduler/server/utils/AlertManager.java
index fc62bcf73d4181f7581c984b3d0a5bd28f52c458..147f538bcaf80de05bbbe0e9b0392169a81cc2bb 100644
--- a/escheduler-server/src/main/java/cn/escheduler/server/utils/AlertManager.java
+++ b/escheduler-server/src/main/java/cn/escheduler/server/utils/AlertManager.java
@@ -175,7 +175,7 @@ public class AlertManager {
         alert.setContent(content);
         alert.setAlertType(AlertType.EMAIL);
         alert.setCreateTime(new Date());
-        alert.setAlertGroupId(processInstance.getWarningGroupId());
+        alert.setAlertGroupId(processInstance.getWarningGroupId() == null ? 1:processInstance.getWarningGroupId());
         alert.setReceivers(processInstance.getProcessDefinition().getReceivers());
         alert.setReceiversCc(processInstance.getProcessDefinition().getReceiversCc());