Blank availability rows are not valid

Previously, it was possible and valid to create blank rows in an availability lookup table. Beginning with PolicyCenter 8.0.0, blank rows are invalid and, if present, prevent the PolicyCenter server from starting. Validation within Product Designer prevents you from committing changes that include blank availability rows. However, it is possible to have such rows in your configuration resulting from upgrades or due to manually editing a lookup table XML file outside of Product Designer.