[mq] Message ack timed out, requeueing

Troubleshooting
1

After restart of SilverBullet (edge) I spot lot of messages like the one below (some with and some without the retries, the body of course changes):

[mq] Message ack timed out, requeueing {
  id: "1740638398943-000250",
  queue: "indexQueue",
  body: "Fleeting Notes/2024-11-01 Redacted.md",
  ts: 1740638592510,
  retries: 1
}

What does it exactly mean, please?