kosteev opened a new issue #15003:
URL: https://github.com/apache/airflow/issues/15003
**Apache Airflow version**: 1.10.15
**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.3",
GitCommit:"1e11e4a2108024935ecfcb2912226cedeafd99df", GitTreeState:"clean",
BuildDate:"2020-10-14T12:50:19Z", GoVersion:"go1.15.2", Compiler:"gc",
Platform:"darwin/amd64"}
**Environment**: GCP Composer environment with Airflow 1.10.15
**What happened**:
Running gcloud command to execute "airflow upgrade_check" fails.
```
gcloud alpha composer environments run af15-mar-24 upgrade_check --location
us-central1
```
```
[2021-03-25 10:59:21,168] {configuration.py:732} INFO - Reading the config
from /etc/airflow/airflow.cfg
[2021-03-25 10:59:21,315] {configuration.py:732} INFO - Reading the config
from /etc/airflow/airflow.cfg
STATUS
Traceback (most recent call last):
File "/usr/local/bin/airflow", line 7, in <module>
exec(compile(f.read(), __file__, 'exec'))
File "/usr/local/lib/airflow/airflow/bin/airflow", line 37, in <module>
args.func(args)
File "/usr/local/lib/airflow/airflow/upgrade/checker.py", line 118, in run
all_rule_statuses = check_upgrade(formatter, rules)
File "/usr/local/lib/airflow/airflow/upgrade/checker.py", line 40, in
check_upgrade
formatter.on_next_rule_status(rule_status)
File "/usr/local/lib/airflow/airflow/upgrade/formatters.py", line 109, in
on_next_rule_status
print(status_line_fmt.format(rule_status.rule.title, status))
ValueError: Sign not allowed in string format specifier
```
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