[2023] Have the game in Ubisoft but open to buy in Steam

Help I bought the game in Ubisoft Connect a long time ago and I was returning to play and I was able to play normally but one day my game stopped to run normally, it run the steam page from Rainbow Six Siege BUT I already have the game in Ubisoft Connect I'm really frustated with this. I tried to unistall and install again, repair the game and update/unupdate windows and nothing worked, yesterday i was able to run the game and play but today when I was going to play with some friends the game opened steam again