FYI I just had a problem adding a table to an existing DB (Firebird). I think it was because my old Auth tables are incompatible with BIGINT.
To make it work, I created the new table manually. For example, I had to
change BIGINT to INTEGER
i.e. from this:
created_by BIGINT REFERENCES auth_user(id) ON DELETE CASCADE
to this:
created_by INTEGER REFERENCES auth_user(id) ON DELETE CASCADE
Thought I would mention it. D

