So, if I change entity's namespace, then PerformSafely silently succeeds: there are no unsafe actions. But if there is actual data in the entity any ugrade will fail, since DO tries to delete all data from the moved entity.

For example. Move an entity Test.EnNodeShape -> Test2.EnNodeShape This will result in this SQL during upgrade:

DELETE FROM [dbo].[EnNodeShape];

Which is actually unacceptable. Luckily the workaround is to add a RenameTypeHint.

I suppose there must be an unsafeaction during upgrade or proper NS change handling