My model lost symmetry and I deleted half and patched it back to restore symmetry. However I forgot that I already had a uv map created, and I had lost half of the UV map.
I have a backup version file that still has the full UV map, but I cant seem to paste and copy the UV from the backup to the latest file.
I have tried:
save vertex map.
copy object from backup (so that the UV map follows it) to latest file and renaming the UV texture.