the best way to stop is to not use the Remanent's at all . but is current day barry inthe know to realise this . does he realize that is what started it and when he went to the speed force to pick those Remanent's up from their realitys that one of them since they are Sentient that one would be regret full towards him. Is he observant enough to have gotten this message this time around compared to what 2024 went through and didn't notice? it would be best not to use the time remanent's . but what savitar is aim for is for barry to be in despair period. cause he thing that'll give birth to him self . it like the writer will still have barry act dense and still see iris killed in front of him and he do something to change it. there's also the better treatment of the time Remanent's. but it seem the writers won't let barry be bright enough to realize that if they are alive & sentient and from a reality formerly linked to his that have become separate. and those time Remanent may be just as dense.