bzr: ERROR: bzrlib.errors.BzrCheckError: Internal check failed: Cannot add revision(s) to repository: missing chk node(s) for id_to_entry maps

[bhupinder@bhupinder-lap mysql_repo]$ bzr branch lp:mysql-server/cluster-7.2 cluster-7.2
bzr: ERROR: bzrlib.errors.BzrCheckError: Internal check failed: Cannot add revision(s) to repository: missing chk node(s) for id_to_entry maps
missing chk node(s) for parent_id_basename_to_file_id maps
missing text keys: [StaticTuple('sp1d-bitkeeper-5ktxf55m7qvjmkk34452awlj2qrwy3e5', '<email address hidden>'), StaticTuple('sp1d-bitkeeper_etc-zz2qpbicsbmyiffqyuj3dgh2kcdr3wub', '<email address hidden>')]

Traceback (most recent call last):
  File "/usr/lib64/python2.6/site-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/bzrlib/commands.py", line 1121, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib64/python2.6/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib64/python2.6/site-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/bzrlib/builtins.py", line 1521, in run
    to_repo.fetch(br_from.repository, revision_id=revision_id)
  File "/usr/lib64/python2.6/site-packages/bzrlib/vf_repository.py", line 1268, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/usr/lib64/python2.6/site-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/bzrlib/vf_repository.py", line 2585, in fetch
    find_ghosts=find_ghosts)
  File "/usr/lib64/python2.6/site-packages/bzrlib/fetch.py", line 77, in __init__
    self.__fetch()
  File "/usr/lib64/python2.6/site-packages/bzrlib/fetch.py", line 104, in __fetch
    self._fetch_everything_for_search(search_result)
  File "/usr/lib64/python2.6/site-packages/bzrlib/fetch.py", line 132, in _fetch_everything_for_search
    stream, from_format, [])
  File "/usr/lib64/python2.6/site-packages/bzrlib/vf_repository.py", line 2051, in insert_stream
    hint = self.target_repo.commit_write_group()
  File "/usr/lib64/python2.6/site-packages/bzrlib/repository.py", line 633, in commit_write_group
    result = self._commit_write_group()
  File "/usr/lib64/python2.6/site-packages/bzrlib/repofmt/pack_repo.py", line 1727, in _commit_write_group
    hint = self._pack_collection._commit_write_group()
  File "/usr/lib64/python2.6/site-packages/bzrlib/repofmt/pack_repo.py", line 1607, in _commit_write_group
    "Cannot add revision(s) to repository: " + problems_summary)
BzrCheckError: Internal check failed: Cannot add revision(s) to repository: missing chk node(s) for id_to_entry maps
missing chk node(s) for parent_id_basename_to_file_id maps
missing text keys: [StaticTuple('sp1d-bitkeeper-5ktxf55m7qvjmkk34452awlj2qrwy3e5', '<email address hidden>'), StaticTuple('sp1d-bitkeeper_etc-zz2qpbicsbmyiffqyuj3dgh2kcdr3wub', '<email address hidden>')]

bzr 2.6.0 on python 2.6.6 (Linux-2.6.39-400.212.1.el6uek.x86_64-x86_64-with-
    redhat-6.4-Santiago)
arguments: ['/usr/bin/bzr', 'branch', 'lp:mysql-server/cluster-7.2',
    'cluster-7.2']
plugins: bash_completion[2.6.0], changelog_merge[2.6.0], grep[2.6.0],
    launchpad[2.6.0], netrc_credential_store[2.6.0], news_merge[2.6.0],
    po_merge[2.6.0], weave_fmt[2.6.0]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.
[bhupinder@bhupinder-lap mysql_repo]$