I'm using the data card for parts and assemblies to assign serial numbers to new parts added to the vault.  I have the part number field set to assign the serial number and I have Updates All Configurations checked.

Every time a user adds a configuration to an existing part, this dumb system gives it a new part number, which is not what we want.  One part number per file, period.

How is it possible to make EPDM do this?

EPDM 2011 sp0