Log spam `Pull request … : Not mergeable` from `BuildStatusChecksPublisher$ChecksGraphListener`

[jglick]

Jenkins and plugins versions report

github-checks 1.0.13 running on Jenkins 2.319.3 (as CloudBees CI), with checks-api 1.7.2 & github-branch-source 2.11.4.

What Operating System are you using (both controller, and any agents involved in the problem)?

Linux

Reproduction steps

Not known exactly; presumably some pull requests with merge conflicts, on a multibranch pipeline using PR-merge strategy.

Expected Results

Nothing in the controller log, or at most a single-line notice.

Actual Results

Numerous stack traces of the form

WARNING	o.j.p.w.cps.CpsFlowExecution#notifyListeners
hudson.AbortException: Pull request … : Not mergeable at …+… (NOT_MERGEABLE)
	at org.jenkinsci.plugins.github_branch_source.PullRequestSCMRevision.validateMergeHash(PullRequestSCMRevision.java:116)
	at org.jenkinsci.plugins.github_branch_source.GitHubSCMSource.retrieve(GitHubSCMSource.java:1697)
	at jenkins.scm.api.SCMSource.fetch(SCMSource.java:582)
	at io.jenkins.plugins.checks.github.SCMFacade.findRevision(SCMFacade.java:156)
Caused: java.lang.IllegalStateException: Could not fetch revision from repository: … and branch: PR-…
	at io.jenkins.plugins.checks.github.SCMFacade.findRevision(SCMFacade.java:159)
	at io.jenkins.plugins.checks.github.GitHubSCMSourceChecksContext.resolveHeadSha(GitHubSCMSourceChecksContext.java:131)
	at io.jenkins.plugins.checks.github.GitHubSCMSourceChecksContext.<init>(GitHubSCMSourceChecksContext.java:46)
	at io.jenkins.plugins.checks.github.GitHubSCMSourceChecksContext.fromRun(GitHubSCMSourceChecksContext.java:24)
	at io.jenkins.plugins.checks.github.GitHubChecksPublisherFactory.createPublisher(GitHubChecksPublisherFactory.java:48)
	at io.jenkins.plugins.checks.api.ChecksPublisherFactory.lambda$fromRun$0(ChecksPublisherFactory.java:89)
	at …
	at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:531)
	at io.jenkins.plugins.checks.api.ChecksPublisherFactory.fromRun(ChecksPublisherFactory.java:92)
	at io.jenkins.plugins.checks.api.ChecksPublisherFactory.fromRun(ChecksPublisherFactory.java:69)
	at io.jenkins.plugins.checks.status.BuildStatusChecksPublisher$ChecksGraphListener.lambda$onNewHead$0(BuildStatusChecksPublisher.java:257)
	at java.util.Optional.ifPresent(Optional.java:159)
	at io.jenkins.plugins.checks.status.BuildStatusChecksPublisher$ChecksGraphListener.onNewHead(BuildStatusChecksPublisher.java:257)
	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.notifyListeners(CpsFlowExecution.java:1473)
	at …

Anything else?

No response