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If you use multiple DBs in Django, When migrating, you need to check the Database Router that you coded.
Check for “allow_migrate” method in your database router class.
This is official Django documentation about this issue.
https://docs.djangoproject.com/ko/1.11/topics/db/multi-db/#allow_migrate
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You should set database name to migrate others database:
./manage.py migrate --database=write
Source:stackexchange.com