Pubsub node operation for Asterisk

I have quite strange issue, may be someone from the openfire community can help me out.
I am integrated Asterisk with openfire.

Asterisk can successfully create the pubsub node but I can see one error. Not sure how to resolve this.

Here are some logs from Asterisk. 2 asterisk servers will update those logs. They both are added as a buddy of each other. It will be hard to do any fix on Asterisk side, is there anyway we can find out the root cause? may be someone have faced this issue before? 1 1 whitelist

ERROR[30833]: res_xmpp.c:1398 xmpp_pubsub_handle_error: Error performing operation on PubSub node SIP/mysipuser, 409.