I think you are confused by the difference between sage advice and the compendium. And what errata vs the compendium entails.

Official rulings on how to interpret rules are made here in the Sage Advice Compendium by the game’s lead rules de- signer, Jeremy Crawford (@JeremyECrawford on Twitter). The public statements of the D&D team, or anyone else at Wizards of the Coast, are not official rulings; they are advice. Jeremy Crawford’s tweets are often a preview of rul- ings that will appear here. A Dungeon Master adjudicates the game and determines whether to use an official ruling in play. The DM always has the final say on rules questions.