On Pages 5 & 6 of this thread, simguru Nick explains the new culling and ghost things. Actually I think Luth updated the original post as well. https://forums.thesims.com/en_US/discussion/comment/16147889#Comment_16147889
Are you experiencing this with an old save? There must have been a lot of tombstones in your world - I imagine this overwhelming tns notice wouldn't happen with a fresh save.
It's actually something a lot of us have wanted for awhile (check out the "death improvements needed" thread in feedback section) relating to inactive family members, like if I'm playing with the grandkids when gramps dies, a tombstone now generates, and if I want to save the ghost for awhile I can strengthen connection, and if I don't, I can either release to netherworld or wait for the spirit to fade on its own. Much better then before where if you were not on the lot when they died, no tombstone and no ghost! I felt like a vulture on death watch, just so I could have a tombstone!
