Do you mean when they post a thread , and the title displays as the name they choose ......
Then afterwards they edit their post , but the title of the thread stays the same even if the details on the thread changed ?
As far as i know that setting would be in the
Usergroups and then in
Administrator Permissions and in each person
Can Administer Threads
By default only admins and mods can edit these things , but i think this may help ...
https://vborg.vbsupport.ru/showthrea...nister+Threads