Evaluate action Check field completion

http://crm.mebelok.com/admin/shop/workflowstatus/207/action/new/ 2nd step Check the fields https://prnt.sc/w2fz6m Enabled check "Supplier additional field product of the process (customorderproduct.postavshchikdoppoleproduktaprotsessa41683)" What is the point, I copy the supplier of the process specified in the product in the add. field and check that all products have a supplier filled in, it works. But I need to add a condition, do not check for products that are completely in reserve. For example, 2 products Product 1, quantity 5, in reserve 5 Item 2, Qty 3, Reserved 1 I need it not to check for goods that are completely in reserve, in this case Product 1 skips and gives an error for product 2 - fill in the supplier, just as if the quantity was 3, and in reserve 0 - give an error. The bottom line is that if the number in the reserve is less than the number of goods - check the fullness of the supplier of the process product. I need an assessment of the improvement, or if t