Not sufficient space to do update

Unpair your Apple Watch via the Watch app on your iPhone.

Then Re-pair your Apple Watch,this deletes temporary and corrupted files

and also clears the system cache freeing up a surprisingly large amount of storage space.And without any loss of data.

Hey debbie9050290502,

It sounds like you're having an issue updating your Apple Watch due to storage space issues. We can understand wanting to get that resolved. We want to help.

We'd recommend following the steps in this article: If you don’t have enough space to update your Apple Watch

Thanks!