fix(bpm):解决包容网关存在多个激活分支时，分支上节点进行退回到包容网关前节点操作时多个execution退回导致的在目标节点创建多个任务问题

yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/listener/DeleteExecutionCommand.java

@@ -0,0 +1,33 @@
+package cn.iocoder.yudao.module.bpm.framework.flowable.core.listener;
+
+/**
+ * @Author whc
+ * @Date 2025/5/21 11:30
+ */
+import org.flowable.common.engine.impl.interceptor.Command;
+import org.flowable.common.engine.impl.interceptor.CommandContext;
+import org.flowable.engine.impl.persistence.entity.ExecutionEntity;
+import org.flowable.engine.impl.persistence.entity.ExecutionEntityManager;
+import org.flowable.engine.impl.util.CommandContextUtil;
+
+public class DeleteExecutionCommand implements Command<Void> {
+
+    private final String executionId;
+    private final String reason;
+
+    public DeleteExecutionCommand(String executionId, String reason) {
+        this.executionId = executionId;
+        this.reason = reason;
+    }
+
+    @Override
+    public Void execute(CommandContext commandContext) {
+        ExecutionEntityManager executionEntityManager = CommandContextUtil.getExecutionEntityManager(commandContext);
+        ExecutionEntity execution = executionEntityManager.findById(executionId);
+        if (execution != null) {
+            executionEntityManager.deleteExecutionAndRelatedData(execution, reason, false);
+        }
+        return null;
+    }
+}
+

yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java

@@ -24,6 +24,7 @@ import cn.iocoder.yudao.module.bpm.enums.task.BpmTaskSignTypeEnum;
 import cn.iocoder.yudao.module.bpm.enums.task.BpmTaskStatusEnum;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.enums.BpmnVariableConstants;
+import cn.iocoder.yudao.module.bpm.framework.flowable.core.listener.DeleteExecutionCommand;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.util.BpmHttpRequestUtils;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.util.BpmnModelUtils;
 import cn.iocoder.yudao.module.bpm.framework.flowable.core.util.FlowableUtils;
@@ -906,9 +907,16 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         // 4. 执行驳回
         // 使用 moveExecutionsToSingleActivityId 替换 moveActivityIdsToSingleActivityId 原因：
         // 当多实例任务回退的时候有问题。相关 issue: https://github.com/flowable/flowable-engine/issues/3944
+        // 选择一个主 execution
+        String mainExecutionId = runExecutionIds.get(0);
+        // 删除其他 execution 解决多个execution会在移动的目标节点创建出多个任务的问题
+        for (int i = 1; i < runExecutionIds.size(); i++) {
+            String redundantId = runExecutionIds.get(i);
+            managementService.executeCommand(new DeleteExecutionCommand(redundantId, "退回清理冗余路径"));
+        }
         runtimeService.createChangeActivityStateBuilder()
                 .processInstanceId(currentTask.getProcessInstanceId())
-                .moveExecutionsToSingleActivityId(runExecutionIds, reqVO.getTargetTaskDefinitionKey())
+                .moveExecutionToActivityId(mainExecutionId, reqVO.getTargetTaskDefinitionKey())
                 .changeState();
     }