Barefruit LTD is interfeering with my backups

Since I installed a new router from my broadband provider, TalkTalk the backups I perform using Deja Dup have been owned by unallocated.barefruit.co.uk in place of the computers name which was originally set. I am now unable to make incremental backups. I want to go back to the good old days when I could carry out incremental backups and the computer's name was in vogue.