It is normally solved by getting WooCommerce to rebuild its product lookup tables. You can do this by visiting WooCommerce > Status > Tools and clicking ‘Regenerate’ for the Product lookup tables tool.
If that doesn’t work, you can turn off the use of the lookup table, by navigating to WooCommerce > Settings > Products and turning off ‘Enable table usage’.
Unfortunately, all these steps did not help.
Hello. Thanks for the clarifications. Now found.
WooCommerce > Settings > Products and turning off ‘Enable table usage’.
Hello. There is no such tab in settings.