`git cl upload` failed with "error in Gerrit backend":

============================================================================================
 cmp@cmp    10:58:57  5341   …/chromium/src   78c0fc09 cmp/tC-task    git cl upload
Running presubmit upload checks ...

Presubmit checks took 2.6s to calculate.

Presubmit checks passed.
 third_party/blink/renderer/modules/indexeddb/idb_database.cc           | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_factory.cc            | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_request.cc            | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_transaction.cc        | 6 +++---
 third_party/blink/renderer/modules/indexeddb/web_idb_callbacks_impl.cc | 4 ++--
 5 files changed, 8 insertions(+), 8 deletions(-)
Title for patchset [IndexedDB: Update task type from kInternalIndexedDB to kDatabaseAccess]: rebase

saving CL description to /usr/local/google/home/cmp/.git_cl_description_backup

To https://chromium.googlesource.com/chromium/src.git
 ! [remote rejected]           82778e499f0d2fa7af5a86d0deee5bb4ad1f52ca -> refs/for/refs/heads/master%notify=NONE,m=rebase,cc=blink-reviews@chromium.org,cc=chromium-reviews@ch
romium.org,cc=cmumford@chromium.org,cc=haraken@chromium.org,cc=jsbell+idb@chromium.org (error in Gerrit backend)
error: failed to push some refs to 'https://chromium.googlesource.com/chromium/src.git'

saving CL description to /usr/local/google/home/cmp/.git_cl_description_backup

Failed to create a change. Please examine output above for the reason of the failure.
Hint: run command below to diagnose common Git/Gerrit credential problems:
  git cl creds-check

 cmp@cmp    11:00:15  5342   …/chromium/src   78c0fc09 cmp/tC-task  ↵ 1  git cl upload
Running presubmit upload checks ...

Presubmit checks took 2.2s to calculate.

Presubmit checks passed.
 third_party/blink/renderer/modules/indexeddb/idb_database.cc           | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_factory.cc            | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_request.cc            | 2 +-
 third_party/blink/renderer/modules/indexeddb/idb_transaction.cc        | 6 +++---
 third_party/blink/renderer/modules/indexeddb/web_idb_callbacks_impl.cc | 4 ++--
 5 files changed, 8 insertions(+), 8 deletions(-)
Title for patchset [IndexedDB: Update task type from kInternalIndexedDB to kDatabaseAccess]: rebase

saving CL description to /usr/local/google/home/cmp/.git_cl_description_backup

remote: Processing changes: refs: 1, updated: 1, done
remote:
remote: SUCCESS
remote:
remote: Updated Changes:
remote:   https://chromium-review.googlesource.com/c/chromium/src/+/1413792 IndexedDB: Update task type from kInternalIndexedDB to kDatabaseAccess
remote:
To https://chromium.googlesource.com/chromium/src.git
 * [new branch]                6072d35fba8b527591e3241179d4eb6c8a765ad3 -> refs/for/refs/heads/master%notify=NONE,m=rebase,cc=blink-reviews@chromium.org,cc=chromium-reviews@ch
romium.org,cc=cmumford@chromium.org,cc=haraken@chromium.org,cc=jsbell+idb@chromium.org
============================================================================================

The failed `git cl upload` took 1m18s and exited with "remote rejected".

Also, git cl upload suggested git cl creds-check, which wasn't necessary, when in the "remote rejected" case is "git cl creds-check" necessary?