| 39 | | As you can see, the problem here is that permissions are not cleaned up, so we are left with an existing `| Can add regular then proxy model | add_regularthenproxymodel | regularthenproxymodel |` row. When the 2.2 migration is applied, it tries to create that exact same row, hence the `IntegrityError`. Unfortunately, there is no `remove_stale_permission` management command like the one for `ContentType`. So I think we can do |
| | 39 | As you can see, the problem here is that permissions are not cleaned up, so we are left with an existing `| Can add regular then proxy model | add_regularthenproxymodel | regularthenproxymodel |` row. When the 2.2 migration is applied, it tries to create that exact same row, hence the `IntegrityError`. Unfortunately, there is no `remove_stale_permission` management command like the one for `ContentType`. So I think we can do one of the following: |