PackageVersionStatus
package:package21.0.0(error) pub publish dry-run failed; add the publish-ignore-warnings label to ignore
package:package31.0.0(error) pub publish dry-run failed; add the publish-ignore-warnings label to ignore
package:package51.2.0(error) pubspec version (1.2.0) and changelog (null) don't agree

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

This check can be disabled by tagging the PR with skip-version-check.