数据库 '%1' 中的快照隔离事务失败，因为自此事务启动后，该语句所访问的对象已由其他并发事务中的 DDL 语句修改。这是不允许的，因为未对元数据进行版本控制。如果与快照隔离混合，对元数据的并发更新可能导致不一致。

Snapshot isolation transaction failed in database '%1' because the object accessed by the statement has been modified by a DDL statement in another concurrent transaction since the start of this transaction. It is disallowed because the metadata is not versioned. A concurrent update to metadata can lead to inconsistency if mixed with snapshot isolation.