数据库 '%1' 中的事务失败，因为该语句是在快照隔离级别下运行的，但该事务不是在快照隔离级别下启动的。您在事务启动后不能将事务的隔离级别更改为快照，除非该事务最初是在快照隔离级别下启动的。

Transaction failed in database '%1' because the statement was run under snapshot isolation but the transaction did not start in snapshot isolation. You cannot change the isolation level of the transaction to snapshot after the transaction has started unless the transaction was originally started under snapshot isolation level.