Python backend remote options are not cleared after deleting the field in Katello
1. Create and sync a python repository with https://pypi.org as upstream url and numpy==1.21.1 as excludes.
2. Note that nothing is synced, which is expected.
3. Clear the excludes field and put the string "numpy==1.21.1" into the includes field.
4. Sync again, and note that again no content is synced.