"Unsupported publisher version" export-flows messages despite both ntopng instances at same version about ntopng

[dlk3]

Upgraded both machines to 6.1.240116 today. The messages continue to be logged.

[NicoMaio]

Hi @dlk3
I'm running the configurations as you have suggested, but no logs are coming out. Could you please update to the latest version and try again?

[dlk3]

I upgraded both instances to the latest from the apt repo and I am still getting these warning messages on the collector end of the conversation.

Given that the messages are not produced for every ZMQ packet that is received, I'm guessing that the messages are associated with some infrequent event that causes a malformed packet to be produced. In the log that I have attached,
ntopng.log the first warning message did not appear until 24 minutes after ntopng was restarted after the upgrade and roughly 11,000 ZMQ messages had been received, according to the interface counters.

I'm wondering if I should run some sort of verbose log or packet capture to try to grab the offending messages? Let me know if there's anything I can do that would be useful to you.

Version: 6.1.240121 [Enterprise/Professional build]
GIT rev: dev:134aad8cf2622c366c2aed414fff85437cec8294:20240121
Pro rev: r6301
Built on: Debian GNU/Linux 12 (bookworm)
System Id: LEF30D305499602D2--OL
Platform: aarch64
Edition: Community