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Argument for @NotNull parameter 'mappingId' of com/jetbrains/upsource/backend/cli/vcs/service/PullRequestNamer.toReadableName must not be null
java.lang.IllegalArgumentException: Argument for @NotNull parameter 'mappingId' of com/jetbrains/upsource/backend/cli/vcs/service/PullRequestNamer.toReadableName must not be null at com.jetbrains.upsource.backend.cli.vcs.service.PullRequestNamer.toReadableName(PullRequestNamer.java) at com.jetbrains.upsource.backend.cli.vcs.service.PullRequestNamer.toReadableName(PullRequestNamer.java:37) at com.jetbrains.upsource.backend.server.integration.github.GithubImporter.fetchPullRequests(GithubImporter.java:468) at com.jetbrains.upsource.backend.server.integration.github.GithubImporter.importPullRequests(GithubImporter.java:173) at com.jetbrains.upsource.backend.server.integration.github.GithubImporter.importAll(GithubImporter.java:120) at com.jetbrains.upsource.backend.server.integration.github.GithubImportService.sync(GithubImportService.java:136) at com.jetbrains.upsource.backend.server.integration.github.GithubImportService.lambda$scheduleSync$592(GithubImportService.java:88) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at com.jetbrains.upsource.util.NamedDaemonThreadFactory.lambda$wrapRunnable$10(NamedDaemonThreadFactory.java:34) at java.lang.Thread.run(Thread.java:745)