After update Joomla form 3.6 to 3.9, PHP to 7.1 and VirtueMart form 3.0 to the newer version I have a problems with saving my products.
When I open my product and click 'save' then I receive error message "1054 Unknown column 'product_stockhandle' in field list". I found issue in topic: http://forum.virtuemart.net/index.php?topic=137301 but unfortunately it doesn't working. When I try using "Install or if necessary update tables " in Tools/Tools & Migration DB Tools I receive error: 1075 Incorrect table definition; there can be only one auto column and it must be defined as a key. I have no idea how resolve the problem.