ERRORS: custom_user.HistoricalCustomUser.history_user: (fields.E300) Field defines a relation with model 'custom_user.CustomUser', which is either not installed, or is abstract.
register()to track changes to the custom user model instead of setting
HistoricalRecordson the model directly. See History for a Third-Party Model.
The reason for this, is that unfortunately
HistoricalRecordscannot be set directly on a swapped user model because of the user foreign key to track the user making changes.