diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomApproveTaskCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomApproveTaskCmd.java
index 2b4f41fae..2641c73df 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomApproveTaskCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomApproveTaskCmd.java
@@ -177,6 +177,9 @@ public class CustomApproveTaskCmd extends AbstractCommand<Void> implements Seria
         if (CollectionUtils.isEmpty(logs)) {
             return;
         }
+        if (CollectionUtils.isEmpty(logs.get(0).getAssigneeFull())) {
+            return;
+        }
         approver.setNodeId(logs.get(0).getAssigneeFull().get(0).getNodeId());
     }