Cannot sync ankiweb and anki app

Hi guys, I’ve been using anki for a couple of weeks, what I usually do is add words through ankiweb then sync my phone, but since yesterday as I try to sync the phone a message tells me decks cannot be “united” and I have to choose between the web deck or the app deck. Why? I didnt add images or sounds that could be trouble, only words and numbers. Can someone help please? Android, app is updated.


It may be Full sync required without comprehensible reason