Syncing problem

I turned my xbox one and put the game in it loaded and asked me to sync the game it took forever so i stopped it and reloaded it and asked me to pick witch sync todays or yesterdays and by accident i picked todays the one i stopped it loaded it now it wants me to play the game all over is there any way to get the sync back from the other day or do i rely have to play the game all over.

Firstly never cancel a sync. Let it take forever - it will finish eventually.

Your only chance is to exit the game and start it up again and hope it gives you the choice of syncs again and choose the older one.