Old threads are often only monitored by the original participants. New threads not only open you up to all possible participants again, they typically get faster response, too.
If you feel an existing thread is particularly relevant to your need, provide a link to the other thread in your new thread.

__________________
Using O365 v2503 - Did you know you can thank someone who helped you? Click on the tiny scale in the right upper hand corner of your helper's post