Notes - Since the children exist already, and should have the relevant fields already filled in you should be able to go minimal on the fields needed.
- Category
- sku
- parentage/variation info
A test on the first set will give you all that is needed if you upload and then check the results. (I’ll edit this to show you what to expect)
For existing a Variation Relationship:
- Build the template with the parent to recreate and copy all it’s info in
- Add the children
- Delete the old parent
- Upload
ETA
So you’ll see this in the upload tab.
After upload, if it doesn’t switch, you go to the far right tab.
Check the far right button:
It will give you info on errors to fix.