diff --git a/module/task/model.php b/module/task/model.php
index abb74d7a78..9cfcafa9da 100644
--- a/module/task/model.php
+++ b/module/task/model.php
@@ -410,9 +410,19 @@ class taskModel extends model
                 $clonedTask->parent = $parentID;
                 $this->dao->insert(TABLE_TASK)->data($clonedTask)->autoCheck()->exec();
 
-                /* Update task estimate log. */
                 $clonedTaskID = $this->dao->lastInsertID();
-                $this->updateTaskID($clonedTaskID, $oldParentTask->id);
+
+                /* Update the table by judging the beginning of the version number. */
+                if(preg_match('/^\d/', $this->config->version))
+                {
+                    /* ZenTao Pms update TABLE_TASKESTIMATE. */
+                    $this->dao->update(TABLE_TASKESTIMATE)->set('task')->eq($clonedTaskID)->where('task')->eq($oldParentTask->id)->exec();
+                }
+                else
+                {
+                    /* ZenTao Pro and ZenTao Biz update TABLE_EFFORT. */
+                    $this->dao->update(TABLE_EFFORT)->set('objectID')->eq($clonedTaskID)->where('objectID')->eq($oldParentTask->id)->exec();
+                }
             }
 
             $this->updateParentStatus($taskID);
@@ -499,19 +509,6 @@ class taskModel extends model
         return !dao::isError();
     }
 
-    /**
-     * Update task ID in TABLE_TASKESTIMATE.
-     *
-     * @param  int    $newID
-     * @param  int    $oldID
-     * @access public
-     * @return void
-     */
-    public function updateTaskID($newID, $oldID)
-    {
-        $this->dao->update(TABLE_TASKESTIMATE)->set('task')->eq($newID)->where('task')->eq($oldID)->exec();
-    }
-
     /**
      * Update parent status by taskID.
      *