[urbanecm@deploy1002 ~]$ scap backport 856551 861475
21:32:51 Checking whether changes are in a branch and version deployed to production...
21:32:51 Checking for relation chains and Depends-Ons...
21:32:51 Change '856551' validated for backport
21:32:51 Change '861475', project 'extensions/DiscussionTools', branches '['wmf/1.40.0-wmf.12']' not found in any deployed wikiversion. Deployed wikiversions: ['1.40.0-wmf.10']
Continue with Backport? (y/n): y
[...]
Fetching submodule extensions/DiscussionTools
From https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
   76199b74..5a524d0f  master            -> origin/master
   ea54a8fa..6efb038a  wmf/1.40.0-wmf.12 -> origin/wmf/1.40.0-wmf.12
21:33:10 Unhandled error:
Traceback (most recent call last):
  File "/var/lib/scap/scap/lib/python3.7/site-packages/scap/cli.py", line 522, in run
    exit_status = app.main(app.extra_arguments)
  File "/var/lib/scap/scap/lib/python3.7/site-packages/scap/plugins/backport.py", line 110, in main
    self._do_backport(change_numbers, change_details)
  File "/var/lib/scap/scap/lib/python3.7/site-packages/scap/plugins/backport.py", line 137, in _do_backport
    self._confirm_commits_to_sync(change_details)
  File "/var/lib/scap/scap/lib/python3.7/site-packages/scap/plugins/backport.py", line 593, in _confirm_commits_to_sync
    repo_commits = self._collect_commit_fingerprints(change_details)
  File "/var/lib/scap/scap/lib/python3.7/site-packages/scap/plugins/backport.py", line 573, in _collect_commit_fingerprints
    repo_commits[repo_location].add(commit)
KeyError: '/srv/mediawiki-staging/php-1.40.0-wmf.12'
21:33:10 backport failed: <KeyError> '/srv/mediawiki-staging/php-1.40.0-wmf.12'
[urbanecm@deploy1002 ~]$