Dynasty Custom Schedule Error

So I ran into this same error last night. I got it to work but I had to play around with it a lot. Basically, you have to change each week and save each time to see what is causing issues. There are some games where if you try to change from a CPU to a user, it will give you the error. For me, I had to change from the CPU to another CPU, then open it, then change to a user. In some cases, it would only let me schedule that specific user if I did it from the other user's side. Some times I would have to change a specific week's CPU game to another CPU game, then open it, then move it to another week where I had wanted to schedule vs a user. I would have to schedule a CPU in that new week. Then open it again and do the same for the other user team to that week. Then it would let me schedule the two. I know this sounds confusing but essentially you have to fiddle with it and try to save after everything you do to either get results to stick or determine what scheduling changes it isn't liking.