Unexpected Block Production Issues on v8.7.3

Hello, I am looking for some help deciphering an error message I am receiving on my BP and 2 relays. All nodes are currently running v8.7.3. I know I am a bit behind on the latest version. My pool has not minted a block in 8 days but initially I was thinking it was just bad luck. After looking further, I am receiving this error on my BP (using journalctl -fu cardano-node) and a very similar variation on both of my relays. At this moment, I have 3 potential ideas:

  1. Should I attempt updating to the latest version 9.1.1?
  2. Potential networking/firewall issue?
  3. Lack of resources? (16GB + 12GB Swap). 5GB Swap being utilized on the BP at the moment and the dedicated 16GB fully utilized

Thank you very much in advance for any assistance on this issue.

There was a hard fork! You need to update!

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Well that was an easy one. Thanks Jeremy. Appreciate you.

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