I have a large number of products entered into our OpenERP v7 database that need to be altered from using the 'Unit(s)' UOM to specific weight or volume UOMs. When I try to make this change, either from the standard form or using mass_edit, I get the following error:
Unit of Measure categories Mismatch! New Unit of Measure 'oz' must belong to same Unit of Measure category 'Unit' as of old Unit of Measure 'Unit(s)'. If you need to change the unit of measure, you may deactivate this product from the 'Procurements' tab and create a new one.
Is there any way around this? I don't understand the reasons for the restriction. What are the implications of forcibly changing the UOM in the database?