I have two companies and I have warehouse resupply configured between them.
When order is placed in the Company B it creates a move from stock to virtual location in Company A.

But this stock move have original client set as a partner so when I'm trying to validate the move I get a multi company error because company of this client is different from company of the move. Quick workaround is to just delete client from this move to a virtual location, but this does not solves the problem. nobody would like to do something like tihs every time.

Using Odoo13