数据库 '%1' 中无快照隔离或读提交的快照，因为启动 SQL Server 时采用了一个或多个未记录的跟踪标志，而这些标志使得用户无法对数据库启用版本控制功能。使用快照隔离启动的事务将失败，并且在读提交快照下运行的查询将成功，但仍将依靠基于锁定的读提交。

Snapshot isolation or read committed snapshot is not available in database '%1' because SQL Server was started with one or more undocumented trace flags that prevent enabling database for versioning. Transaction started with snapshot isolation will fail and a query running under read committed snapshot will succeed but will resort back to lock based read committed.