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Instagram’s Graph API requires a two-step publish: create a media container, then publish it. The container stays valid for 24 hours. If the publish step happens after that window, Instagram rejects with code 100, error_subcode 2207003 and the container is unrecoverable — you have to start over.

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Why this happens

  • A scheduled post was queued more than 24 h after creation.
  • The publish job retried so many times that the cumulative delay exceeded 24 h.
  • An idempotency replay landed against a stale container.

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How to fix

Re-create the container and publish in one flow. letmepost.dev does this automatically on retry — the worker rebuilds the container if the previous one is older than 24 h, so the only time you see instagram.container.expired surfaced to your app is when the post body itself is unrecoverable (e.g., the source media URL is now 404).