Clipping drawings disconnect from model when file is duplicated

Hello there. I’m using quite a lot of clipping planes for an interior project. I’ve created clipping drawings from every clipping plane. After I duplicated the file to save it as a backup, I realised that in the original file all the clipping drawings were disconnected, or at least they don’t update anymore when I make changes to the model. The clipping drawings in the duplicated file are still working though. Is there any way I can fix this? Thanks.