Problem with bzr branch

I have a problem with pushing to lp:~awn-core/libdesktop-agnostic/various-fixes. The error message is:

$ bzr push
Using saved push location: bzr+ssh://bazaar.launchpad.net/~awn-core/libdesktop-agnostic/various-fixes/
bzr: ERROR: Server sent an unexpected error: ('error', "Cannot lock LockDir(lp-77515728:///~awn-core/libdesktop-agnostic/various-fixes/.bzr/branchlock): File exists: u'/srv/bazaar.launchpad.net/mirrors/00/02/44/a5/.bzr/branch/lock': [Errno 17] File exists: '/srv/bazaar.launchpad.net/mirrors/00/02/44/a5/.bzr/branch/lock'")

I tried using break-lock but it doesn't help, break-lock doesn't show any error, but after pushing again the same error ^^ appears.

Some additional info:
$ bzr info
Standalone tree (format: 1.6)
Location:
  branch root: .

Related branches:
    push branch: bzr+ssh://bazaar.launchpad.net/~awn-core/libdesktop-agnostic/various-fixes/
  parent branch: bzr+ssh://bazaar.launchpad.net/%2Bbranch/libdesktop-agnostic/
  submit branch: bzr+ssh://bazaar.launchpad.net/%7Emalept/libdesktop-agnostic/trunk/

The problem is probably related to the fact that the branch was created while lp:libdesktop-agnostic referred to lp:~malept/libdesktop-agnostic/trunk, but now it belongs to "libdesktop-agnostic developers" team and therefore the parent uri has changed.

Any suggestions how to fix this error?