not all related options are set

I am currently working on an Opencart based website but I get this error.

"not all related options are set" while using the related options plugin do you have any idea? I've checked already and all the products are fine. This only happens when you upload more than a certain amount of prodcuts variations.


Thank you for your response in advance

I have the same problem with about 100 different related options set in one variant with just two options.