Reg:-To avoid validation while doing the workflow


In Product Information and Management module,when I am selecting the record in Release Products form which is the Product sub type as Product then while submitting I am getting the warning as Product dimension group must be filled in.This warning stopping the entire workflow process after submitting.

But when we select the record which is the Product sub type as Product master this warning is not coming because while creating the product master we are filling that dimension field but for product sub type it is not mandatory to fill product dimension field.

So can anybody tell me how to avoid this warning for this product sub type after submitting the workflow record.