The field X was renamed conflicting with an existing field name

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For years, Alteryx would gracefully rename conflicting field names. It would issue a warning and that's it.

We recently upgraded from 2019.4 to 2022.1.1.30961 and now an error is produced:

Oops!

The field X was renamed conflicting with an existing field name

I searched for "rename" in every release notes version applicable and I do not see this. Is it a bug? Is it a feature?

We have an Alteryx server with thousands of workflows built by dozens of users with varying skill levels. This is a tremendous amount of work to go through and fix all the failing workflows.

Please help me understand this change because there was seemingly no warning and now we are scrambling.