lightroom to lightroom classic back to lightroom

Well, I messed up.  I had my photos in Lightroom (the new, cloud based) then I migrated to Lightroom classice.....but I want to go back to the cloud based Lightroom.  Any reason I cannot do this?  Anything I should be carful about?  Are there any files that were created during the initial migration that I can delete now in order to free up hard drive space?