Prevent Zero Dollar Pay Changes

Summary: We would like to prevent managers/supervisors from entering the change pay section and then not making an actual change to the salary.

This is an approved usecase. Company is QUAD/GRAPHICS, INC. and the usecase is #4

Content (required): I have tried creating the logic for this rule but unfortunately when I compare existing salary to new salary it comes back with the same amount (old salary) so this rule is firing every time someone goes into the change pay section - whether they enter a pay change or not.

Version (include the version you are using, if applicable): 22C