unable to obtain lock

when trying to update I receive the following message:

Run command: bzr update
Unable to obtain lock file:///L:/LearJet/trunk/ held by Debbie <Debbie@wslc>
at wslc-2-PC [process #7892], acquired 74 hours, 8 minutes ago.
Will continue to try until 15:39:32, unless you press Ctrl-C.
See "bzr help break-lock" for more.
bzr: ERROR: Could not acquire lock "(local)": file:///L:/LearJet/trunk/

I found a similar question with this answer which seems to fit my problem:

The message should mention that you can run 'bzr break-lock' if you know the
lock is stale.

However, my knowledge of bazaar is very basic and I'm not sure how to "run 'bzr break-lock". I'm hoping for more details on how to do this. Or a different answer if I'm on the wrong track.

Thanks!