Error occurred during execution of 'DelayedJobScheduler' process

Hello, we are seeing in our log the following error that happens more or less every 5 minutes, but we don’t have any idea why it happens. Anybody can help? It’s not actually affecting any user, and we don’t have any job in error state, but we would anyway would like not to see it.

Hangfire.Server.DelayedJobScheduler|Hangfire.Logging.LogProviders.NLogLogProvider+NLogLogger.LogException|Error occurred during execution of ‘DelayedJobScheduler’ process. Execution will be retried (attempt 123 of 2147483647) in 00:05:00 seconds.|InfiniteLoopProcess.Execute => AutomaticRetryProcess.Execute => NLogLogger.LogException

We are running version 1.5.2