Comment 1 for bug 1932373

Thanks for reporting this issue.
There was some debate around this and CI issues:
https://review.opendev.org/q/69b3762dda47272513e02340e7942d5a39f825c5

The bug at that time is this:
https://bugs.launchpad.net/neutron/+bug/1849976

There was a fix which included the move of the migration script from train to ussuri folder.
By the "Duplicate column name 'binding_index'" I have the feeling You run into this migration script move/rename.