locked_on & locked_by fields for products

[Rsn]

Hello!

There are fields locked_on & locked_by in VM database table #__virtuemart_products.

How are they used?
What do these fields affect?

I don't see these fields in the settings for each product (product edit view in admin panel).

Thank you in advance!

[GJC Web Design]

They are unused

[Rsn]

Thanks for the answer, GJC Web Design!