源表的外键不能标记为is_not_trusted(可在sys.foreign_keys目录视图中查看),除非目标表的相应外键也标记为is_not_trusted。

• The foreign keys of the source table cannot be marked is_not_trusted (viewable in the sys. Foreign_keys catalog view), unless the corresponding foreign key of the target table is also marked is_not_trusted.