nRF mesh publish error 15 ( forbidden )

Dear all,

I have a critical problem about mesh network.

After running 2 days, some device in mesh network cannot publish message with error 15 ( forbidden ).

I tried to search in devzone, I found some people has the same problem with me.

I think iv index update produce or sequence number has problems.

But i only send 1 ping message per hour, and sometimes response keep alive message from gateways.

I cannot figure with that problems happen.

How can i recover device when publishcation forbidden occurs?

Thank you.