You have to click clicking "Do not delete".
Bear in mind that forums, blogs, newspapers, etc, are by their nature intended to be constantly updated and added to, whether by the owner or by participants, followers or users.
If you are using Nabble for definitive historic data about which there can be no discussion, debate, or reaction, then you are not really using Nabble for its intended purpose. You either need to consider using some other tool or accept that you need to tell Nabble that as far as you are concerned you are just waiting for someone to react to what you post!
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.