If you have an MQTT Transmission History Store configured with data stored that you no longer want to be transmitted the next time MQTT Transmission connects to a server:
- Disable MQTT Transmission
- On the file system, identify the History store and delete the file
- File(s) are located in the directory when Ignition is installed ~/user-lib/cls/data/h2
- File naming convention is "HistoryStore Name"-xxxxx.mv.db where xxxxx is the internal ID of the history store
- Enable MQTT Transmission
- If the History Store configuration is enabled, a new history store will be created