Error: DBConnection W Rolling back unfinished WRITE transaction!

This is a generic error message that is not important. It just means that any transaction that may have been in process the last time Build Forge was shut down abruptly or on purpose are taken care of essentially. No need to worry. The only time to worry is if you start the Build Forge engine in the foreground and watch the log as BF starts. If the log get's to this error and appears to be stuck. It's because the services layer was not connected.