Cannot lock LockDir(lp--1218658708:///~5-a-day/5-a-day-data/main/.bzr/branchlock): Transport operation not possible: readonly transport

sarah@saturn:~/Desktop% add-5-a-day 194631 190050 150577 140612 178903 196786
Tree is up to date at revision 714.
added hobbsee
bzr: ERROR: Cannot lock LockDir(lp--1218404756:///~5-a-day/5-a-day-data/main/.bzr/branchlock): Transport operation not possible: readonly transport
bzr failed with error code 768
sarah@saturn:~/Desktop% add-5-a-day 194631 190050 150577 140612 178903 196786
Tree is up to date at revision 714.
bzr: ERROR: Cannot lock LockDir(lp--1217675668:///~5-a-day/5-a-day-data/main/.bzr/branchlock): Transport operation not possible: readonly transport
bzr failed with error code 768
sarah@saturn:~/Desktop% locate add-5-a-day 3:19PM
sarah@saturn:~/Desktop% sudo vi /usr/bin/add-5-a-day 3:19PM
sarah@saturn:~/Desktop% sudo vi /usr/bin/add-5-a-day 3:21PM
sarah@saturn:~/Desktop% touch ~/.5-a-day-data 3:23PM
sarah@saturn:~/Desktop% add-5-a-day 194631 190050 150577 140612 178903 196786 3:23PM
 M tgalati4
All changes applied successfully.
Updated to revision 715.
bzr: ERROR: Cannot lock LockDir(lp--1217741204:///~5-a-day/5-a-day-data/main/.bzr/branchlock): Transport operation not possible: readonly transport
bzr failed with error code 768

sarah@saturn:~% add-5-a-day 194631 190050 150577 140612 178903 196786 7:23PM
Tree is up to date at revision 726.
added hobbsee
bzr: ERROR: Cannot lock LockDir(lp--1218658708:///~5-a-day/5-a-day-data/main/.bzr/branchlock): Transport operation not possible: readonly transport
bzr failed with error code 768

sarah@saturn:~/.5-a-day-data% bzr info -v 7:47PM
Checkout (format: pack-0.92)
Location:
       checkout root: .
  checkout of branch: bzr+ssh://<email address hidden>/%7E5-a-day/5-a-day-data/main/

Format:
       control: Meta directory format 1
  working tree: Working tree format 4
        branch: Branch format 6
    repository: Packs containing knits without subtree support

In the working tree:
        54 unchanged
         0 modified
         1 added
         0 removed
         0 renamed
         0 unknown
         0 ignored
         0 versioned subdirectories

Branch history:
       726 revisions
        62 committers
        15 days old
   first revision: Wed 2008-02-13 10:15:05 +0100
  latest revision: Fri 2008-02-29 08:10:44 +0100

Repository:
       726 revisions
       903 KiB