## Introduction
When migrating a v1 index name to v2 it might collide with an existing
v2 index
In this case we remove both the v1 metadata and pg index
In case of a metadata and pg_index desync this might occur too late in
the process that's why we have two fallback
One computing the v1 deletion from the metadata and another one in the
catch block of the v1 to migration transaction commit
Paul Rastoin
8c79353bfb