So the question now is, which module should have control of the uc_product_adjustments table? uc_product or uc_attribute? When it was created, uc_attribute was an optional module that provided features to its dependency uc_product. I don't think the idea of attributes and options should be required for someone wanting to sell products online. But if uc_product_adjustments belonged to the uc_product module, I don't think that uc_attribute should necessarily have exclusive rights to the combination column. But trying to accommodate any number of other modules could make it more complicated than it should be.

Or maybe I'm just overcomplicating things unnecessarily.