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Changes between Initial Version and Version 2 of Ticket #28573

-              initial
+              v2
 Putting aside most of it; when running it, I was getting the following error:
+{{{
     django.db.utils.ProgrammingError: column "customer_from_source_id" does not exist
+}}}
 That was very confusing, but when debugging it I found out that it's choking all the way at the end on the following sql statement:
 …
 Now, that's weird because it shouldn't be creating that index on "customer_from_source_id" but on "customer_id" instead. The field is first created like so:
+{{{
         migrations.AddField(
             model_name="card",
 …
             field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name="sources", to="djstripe.Customer"),
         ),
+}}}
 Then, it is renamed:
+{{{
         migrations.RenameField(
             model_name="card",
 …
             new_name="customer",
         ),
+}}}