This message is constantly poping up in admin
WarningYour store still has old product variations. They currently appear as separate products, without the ability to switch between them. To make them work as before the upgrade, convert old variations to new variations. It's easy and automatic.
It is in a multistore installation and does not matter who logs in the message pops up.
But when the link is clicked it says
No data for conversion found: it appears that your store doesn't have option combinations or product variations.
How do I get ride of this message.