#29224: Migration crashes deleting an index_together if there is a 
unique_together
on the same fields
--------------------------------+------------------------------------
     Reporter:  Matthieu Rigal  |                    Owner:  nobody
         Type:  Bug             |                   Status:  new
    Component:  Migrations      |                  Version:  1.11
     Severity:  Normal          |               Resolution:
     Keywords:  index           |             Triage Stage:  Accepted
    Has patch:  0               |      Needs documentation:  0
  Needs tests:  0               |  Patch needs improvement:  0
Easy pickings:  0               |                    UI/UX:  0
--------------------------------+------------------------------------

Comment (by Jeff):

 I haven't looked under the hood on this yet, but could it be related to
 the ordering of the operations generated for the mgiration? on first
 inspection it feels like this and
 [https://code.djangoproject.com/ticket/28862 #28862] could be caused by
 the same/similar underlying problem in how `FieldRelatedOptionOperation`
 subclasses ordering is handled in the migration `autodetector`'s migration
 optimizer.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/29224#comment:2>
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