Subscription found for a non-existent node

Hi

/var/log/openfire/openfire.log

it generates a whole bunch of entries like this for me:

2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark
2026.05.28 18:07:22.674 ^[[33mWARN ^[[m [socket_c2s_ssl-worker-5]: org.jivesoftware.openfire.pubsub.DefaultPubSubPersistenceProvider - Subscription found for a non-existent node: user@spark

Can I do something about it?