Dear Stephen,

I have played with the import and export functions.
Import products, productvariants, productvariantgroups, productsgroupvariantsoptions, productvariantoptions.

After an import of the productvariantoptions I got a green message bar with successfully import message.
When I navigate to user interface to check if everything was ok, then I got the error message mentioned below.

I had imported before other Pgroups, Pgroupoptions and Pvariantoptions and everything went well.
So I was surprised by this error message.

When I try to delete the latest Pvariantoptions then I got the error message mentioned at the bottom.
I also cannot discover or how to locate this duplicate key.

Do you have ane suggestion how to remove this duplicate key?

Regards, Ton