I have unpaired my and restarted my watch and won’t even let me set it up, still says it can’t update!
My watch won’t update! I have unpaired and it won’t let me set it up again. Says it can’t update again
Apple Watch
Without knowing the exact message that is displayed, perhaps one of these articles will help:
If you don’t have enough space to update your Apple Watch - Apple Support
If you see 'Unable to Verify Update' when updating Apple Watch - Apple Support