Undo 操作遇到的上下文与相应 Set 操作中应用的上下文不同。可是因为在线程上 Set 了一个上下文但未进行还原(撤消)。

The Undo operation encountered a context that is different from what was applied in the corresponding Set operation. The possible cause is that a context was Set on the thread and not reverted(undone).