A meta tag inherited from e621, which until site update v. 26.06.03 had hard-coded effects on which flag reasons were applicable for a post. After the update this behaviour was made configurable and subsequently disabled, as it was deemed irrelevant to e6ai.

This tag no longer has any purpose and should not be used.

To replace a post grandfathered for quality reasons with a superior version you must also fix said quality issues (same goes when using the "inferior of" flag). If the fixed post is too different to qualify for a replacement, then upload it normally and optionally add the old post as a parent.