Tag clean-up: this bulk suggestion removes duplicate tags from surgery shelf "only_step2" tags, where cards were tagged with both "#AK_Step2_v12::!Shelf::Surgery::no_dupes::only_step2" and either #AK_Step2_v12::!Shelf::Surgery" and/or "#AK_Step2_v12::!Shelf::Surgery::no_dupes".
This process should be flawless, and avoid me pushing any local edits I may have made and forgotten to protect. What I did was filtered cards by using the following:
"deck:AnKing Step Deck" tag:#AK\_Step2\_v12::!Shelf::Surgery::no\_dupes::only\_step2 -tag:AnkiHub\_Protect
I then protected all of the fields on all of the cards (Protect Field -> Protect All).
I then used command+option+shift+A to bulk delete the tag of "#AK_Step2_v12::!Shelf::Surgery". This removed ALL !Shelf::Surgery tags. I then re-tagged all of these cards (bulk) with "#AK_Step2_v12::!Shelf::Surgery::no_dupes::only_step2". In essence this should push the deletion of all !Shelf::Surgery tags that aren't "only_step2" while retaining the desired only_step2 tag.