rebase not working?

hey! i wanted to rebase to bazzite-deck, but somehow it doesn't seem to work right now. "brh rebase bazzite-deck:stable" just spits out "error: Invalid refspec ostree-image-signed:ghcr.io/ublue-os/bazzite-deck:stable
Rebase failed. Image may not exist or be accessible"

can you help me out?