You can not make a generic adjustment to work with warning messages. You can't even access the messages via scripts. Its simply not possible to do. I would have added it to the community Pack long ago if it was.
Every warning message is thrown based on specific unique logic checks. You will need to figure out what to change to make the warning go away and make a unique adjustment for this situation. Note some of the logic is hidden in component scripts and you may not be able to suppress the warning.
General Hero Lab Support & Community Resources is a sticky thread at top of Forum where you request official support for issues. A bug is
ANYTHING you think is not working correctly. Weather you know for a fact or are just wondering if it is wrong. Report it using the above links to get an official response from Lone Wolf.