"bzr tags" errors out

[Eli Zaretskii]

Running "bzr tags" in my bound branch of Emacs errors out with this
message:

  bzr: ERROR: rev_id {cyd at stupidchicken.com-20090730011415-1ur84cd4r2dats1v} not in database

The details from .bzr.log are below.  This is with bzr 2.4.1 on
Windows XP.

What does this mean?  How can I fix it?

FWIW, I haven't seen this on another system where I have the same
bound branch.  None of the other commands I used since I started using
Bazaar produced such an error (I just searched all the past
.bzr.log.old* files).

TIA

Here's the backtrace:

  Wed 2011-09-21 19:39:59 +0300
  0.125  bazaar version: 2.4.1
  0.125  bzr arguments: [u'tags']
  0.187  looking for plugins in C:/Documents and Settings/Zaretzky/Application Data/bazaar/2.0/plugins
  0.187  looking for plugins in D:/usr/Bazaar/plugins
  0.328  encoding stdout as sys.stdin encoding 'cp1252'
  10.109  Transferred: 0kB (0.0kB/s r:0kB w:0kB)
  10.109  Traceback (most recent call last):
    File "bzrlib\commands.pyo", line 946, in exception_to_return_code
    File "bzrlib\commands.pyo", line 1150, in run_bzr
    File "bzrlib\commands.pyo", line 699, in run_argv_aliases
    File "bzrlib\commands.pyo", line 721, in run
    File "bzrlib\cleanup.pyo", line 135, in run_simple
    File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
    File "bzrlib\commands.pyo", line 1165, in ignore_pipe
    File "bzrlib\builtins.pyo", line 5631, in run
    File "bzrlib\decorators.pyo", line 154, in read_locked
    File "bzrlib\branch.pyo", line 385, in revision_id_to_dotted_revno
    File "D:/usr/Bazaar/plugins\history_db\__init__.py", line 231, in _history_db_revision_id_to_dotted_revno
    File "D:/usr/Bazaar/plugins\history_db\history_db.py", line 1385, in get_dotted_revnos
  BzrError: rev_id {cyd at stupidchicken.com-20090730011415-1ur84cd4r2dats1v} not in database