Migrations depending on other app's __last__ migration fail
|Reported by:||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
This happened to me when migrations have no been created at the same time in all applications. Also happened when using polymorphic models which made my custom user model depend on ContentType. In all cases making the migration *or* running them fails with "Dependency references nonexistent parent node ('<application>', 'last')"