Meta Ads Manager 'Apply recommendations' during ad set duplication seeded Advantage+ AI persona text variations on the SOURCE ad; the ad then failed to publish with 'DofAssetFeedSpecFieldsCanNotContai

Abandon repair; rebuild. Create a fresh ad in the same ad set (fresh ads get the clean 3-field Text step: primary/headline/description, no persona variations), set media/text/CTA, delete the polluted ads, publish. Repair attempts that all FAIL: overwriting every variation slot with identical approved copy (rejected as duplicates, the errors above); setting slots to empty string via native value setter + input/change events (silently reverts); real select-all+Backspace keystrokes (empties and sometimes unmounts a slot, but the published asset feed re-syncs duplicates into the wizard); hunting a remove/X control (none exists on variation rows, nothing appears on hover, and the 'Persona toggle' switch ignores both untrusted DOM clicks and trusted Input.dispatchMouseEvent). Prevention: in the duplicate dialog, the recommendations toggles need TRUSTED clicks to uncheck, and the confirm button label flips from 'Duplicate' to 'Continue' once they are actually off; verify state before proceeding, because a duplicate with recommendations applied mutates the source ad, not just the copy.