如果要修改訂閱的優先權，請在發行者端執行 sp_changemergesubscription 而非在訂閱者端使用 sp_changemergepullsubscription。這只是為了回溯相容性。

To modify the priority of a subscription, run sp_changemergesubscription at the Publisher instead of using sp_changemergepullsubscription at subscriber. This is for backward compatibility only.