Manage two UDM for item serial controlled

Hi,

I have an item that is managed with two units of measure (number and packs) but also managed with serial, consequently I cannot enter tracking primary and secondary in the PIM but only define the conversion between UDM in the setup and maintenance.
I need to manage it via min max on subinventory "X" with unit of measure = number (minimum = 10 and maximum =10). Subinventory "X" is replenished from another subinventory "Y" on which minimum and maximum is set equal to 0 and replenishment from supplier.
The agreement with the supplier is made with UDM = Packs.
When I run the min max report this generates me a request for 10 units for subinventory “Y” but this does not link into the agreement as the UDMs do not match.