InconsistentMigrationHistory triggers on squashed migrations when not all replaced migrations are applied

[GwynBleidD]

#27004 fixed a bug with triggering InconsistentMigrationHistory in some cases but not all of them. For example in migration tree:

               0001_sq_0002
                /        \
    App A:    0001 ---> 0002
                |
    App B:    0001

When only A.0001 and B.0002 are applied

I think ​fix applied in #27004 should check if any of migrations replaced are already applied, not if all of them. When any of them is applied, we are already on a separate path of applying migration and squash migration will only be marked as applied, so it should be fine to change it from all to any.

[Mariusz Felisiak]

Thanks for the report. Can you provide a sample project? Can you reproduce InconsistentMigrationHistory in the Django 4.0, 4.1a1, and the current main branch? (we made some improvements in this area.)

[Mariusz Felisiak]

I cannot reproduce any InconsistentMigrationHistory when only A.0001 and B.0001 are applied (B.0002 from the ticket description doesn't exist.)