[Решено] Woocommerce variation source language gone

Background of the issue:
I am installing WPML Woocommerce multilingual on my site скрытая ссылка. All is going well, but I am facing an issue with product variations in the original source language.

Symptoms:
The variations under the original source language are gone. I did the synchronization under the attribute translation, but when I view a product in the original language, I cannot expand the variations. It shows there is a variation, but I can't view or edit it. See: скрытая ссылка

Questions:
Why are the product variations not visible in the original source language after synchronization?
How can I view and edit the product variations in the original language?