This is just for brainstorming. I'm not certain it would be possible as a general scenario, or would require a specific rule per-language....

We should warn a user when a PMD suppression is being applied, but there is no warning to be suppressed (either, it was a false positive fixed on a newer version of PMD, the rule was removed / reconfigured, the code was rewritten / modified, whatever).

This will help clean the code, and avoid having new issues suppressed by mistake.