sidekiq Cannot obtain an exclusive lease for namespace:namespaces_root_statistics:40

I'm running Gitlab 13.10.4-ce and there's a recurring logged entry in log: Today 8:15:24 AM gitlab-sidekiq-all-in-1-v1-55d4674f86-xljdm sidekiq Cannot obtain an exclusive lease for namespace:namespaces_root_statistics:40. There must be another instance already in execution. I've seen the same error in https://forum.gitlab.com/t/access-request-email-notification-not-sent/47358.