Hi In general it is preferable to start a new discussion to keep the details of different environments/questions separate and improve visibility of new discussions. That will also allow you to mark your topic as “Solved” when you resolve any outstanding questions.
Mentioning the url of an existing discussion on the forum will automatically create links between related discussions for other users to follow.
Please have a look at How to write a good post/question for some ideas on best practices.
I also recommend reading Getting Started with the MongoDB Community: README.1ST for some tips to help improve your community outcomes.
Regards,
Aasawari