diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
index 2d794fb64..58e11170f 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/helper/CustomTaskHelper.java
@@ -312,6 +312,7 @@ public class CustomTaskHelper {
             return delegateAssigners;
         }
         return new ArrayList<>(delegateAssigners.stream()
+                .filter(i -> StringUtils.hasText(i.getPersonId()))
                 .collect(Collectors.toMap(BpmnTaskDelegateAssigner::getPersonId, Function.identity(), (s, t) -> s))
                 .values());
     }
diff --git a/workflow-engine-server/src/main/java/cn/axzo/workflow/server/controller/delegate/AbstractBpmnTaskAssigneeSelector.java b/workflow-engine-server/src/main/java/cn/axzo/workflow/server/controller/delegate/AbstractBpmnTaskAssigneeSelector.java
index dec1a028d..7010046c9 100644
--- a/workflow-engine-server/src/main/java/cn/axzo/workflow/server/controller/delegate/AbstractBpmnTaskAssigneeSelector.java
+++ b/workflow-engine-server/src/main/java/cn/axzo/workflow/server/controller/delegate/AbstractBpmnTaskAssigneeSelector.java
@@ -20,6 +20,7 @@ import org.springframework.beans.BeansException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.util.StopWatch;
+import org.springframework.util.StringUtils;
 
 import java.util.Collections;
 import java.util.List;
@@ -46,7 +47,8 @@ public abstract class AbstractBpmnTaskAssigneeSelector implements BpmnTaskAssign
     @Override
     public List<BpmnTaskDelegateAssigner> select(UserTask userTask, DelegateExecution execution,
                                                  Boolean throwException) {
-        return (List<BpmnTaskDelegateAssigner>) BpmnMetaParserHelper.getApproverScope(userTask)
+        List<BpmnTaskDelegateAssigner> assigners =
+                (List<BpmnTaskDelegateAssigner>) BpmnMetaParserHelper.getApproverScope(userTask)
                 .map(approverScopeEnum -> {
                     if (Objects.isNull(approverScopeEnum.getProcessor())) {
                         return Collections.emptyList();
@@ -67,6 +69,7 @@ public abstract class AbstractBpmnTaskAssigneeSelector implements BpmnTaskAssign
                         }
                     }
                 }).orElseGet(Collections::emptyList);
+        return assigners.stream().filter(i -> StringUtils.hasText(i.getPersonId())).collect(Collectors.toList());
     }
 
     protected List<BpmnTaskDelegateAssigner> invokeService(UserTask userTask, DelegateExecution execution,