The OP is new to Gramps. So they won’t know what to do with the PR link… or that it is informational only and they SHOULDN’T do anything with it. Just that there will be a solution with the next MAJOR release. (Currently assumed this will be the 5.2 version. No date for that release has been set yet.)
Thank you very much for going through this trouble. I have attached an example. Which would also apply for cremations and possibly other dates after death.