CFA Level 1 study material

Hi there , this is regarding the preperation of level 1. I would’ve given the exam this June but we all know that unfortunately it has been postponed. I did not intend it to give it in December as I my college schedule won’t allow it. Should I refer to the same material or change to a new one ? Personally I would like to continue with the current edition as i’m already half way through . Would there be a drastic change in the curriculum if I attempt it next year ?