This one is a bit of a mystery. nxia@ can you investigate?

https://uberchromegw.corp.google.com/i/chromeos/builders/master-paladin/builds/12545/steps/CommitQueueSync/logs/stdio

@@@STEP_FAILURE@@@
21:23:25: ERROR: <class 'chromite.lib.patch.ChangeNotInManifest'>: CL:390191 could not be found in the repo manifest.
Traceback (most recent call last):
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/failures_lib.py", line 172, in wrapped_functor
    return functor(*args, **kwargs)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/stages/sync_stages.py", line 837, in PerformStage
    next_manifest = self.GetNextManifest()
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/stages/sync_stages.py", line 1160, in GetNextManifest
    validation_pool=self.pool, build_id=build_id)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/lkgm_manager.py", line 366, in CreateNewCandidate
    if (not validation_pool.ApplyPoolIntoRepo() and
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 1733, in ApplyPoolIntoRepo
    candidates, manifest=manifest)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 394, in f
    return functor(self, *args, **kwargs)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 914, in Apply
    changes = self.FetchChanges(changes)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 792, in FetchChanges
    repo = self.GetGitRepoForChange(change, strict=True)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 394, in f
    return functor(self, *args, **kwargs)
  File "/b/build/slave/master-paladin-master/build/chromite/cbuildbot/validation_pool.py", line 418, in GetGitRepoForChange
    checkout = change.GetCheckout(self.manifest, strict=strict)
  File "/b/build/slave/master-paladin-master/build/chromite/lib/patch.py", line 1278, in GetCheckout
    raise ChangeNotInManifest(self)
ChangeNotInManifest: CL:390191 could not be found in the repo manifest.