There are a few open tickets that may be related:
https://code.djangoproject.com/ticket/23521 - removal of concrete Model
from bases doesn't remove it from ModelState bases
https://code.djangoproject.com/ticket/26488 - migrate raises
InvalidBasesError if you rename a multitable inheritance base
Hello,
on a journey to change a model from a concrete inheritance to an abstract one
i've created a migration operation to change the bases of a model state in the
migrations machinery. Is there a reason that there's not one in django? Would it
be interesting to add it?
thanks in advance
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