Error reference changederrors
Nearest release: v2.1.305, published under an hour after upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 20 Oct 2026 18:57 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 20 Oct 2026 19:07 UTC.
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Recorded edits187to this page, all time
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197197| `Installation was killed before it could finish (exit code 137)` | [Troubleshoot installation and login](/docs/en/troubleshoot-install#installation-was-killed-before-it-could-finish) |
198198| `The connection dropped while downloading the update` | [Troubleshoot installation and login](/docs/en/troubleshoot-install#the-connection-dropped-while-downloading-the-update) |
199199| `Download timed out: exceeded the total deadline` | [Troubleshoot installation and login](/docs/en/troubleshoot-install#the-connection-dropped-while-downloading-the-update) |
200| `Release verification failed for Claude Code <version> (<reason>). The update was not installed.` | [Troubleshoot installation and login](/docs/en/troubleshoot-install#release-verification-failed) |
201| `Auto-update failed · Run claude doctor` | [Troubleshoot installation and login](/docs/en/troubleshoot-install#auto-update-failed) |
200202| `--bg and --print conflict` | [Command-line errors](#conflict-between-bg-and-print) |
201203| `Couldn't tell whether --bg is a flag or text here, so nothing was started` | [Command-line errors](#couldnt-tell-whether-bg-is-a-flag-or-text) |
202204| `Error: Cannot use both --append-subagent-system-prompt and --append-subagent-system-prompt-file. Please use only one.` | [Command-line errors](#conflict-between-a-system-prompt-flag-and-its-file-form) |
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26932695**What to do:**
26942696
26952697* If you are using Opus 4.7 or Opus 4.8, run `claude update` first. Versions before v2.1.156 can trigger this error during normal tool use, and `/rewind` doesn't clear it.
2696* Run `/rewind`, or press Esc twice, to step back to a checkpoint before the corrupted turn and continue from there. See [Checkpointing](/docs/en/checkpointing) for how checkpoints are created and restored.
2697
2698### Invalid data in redacted\_thinking block
2699
2700The API refused the request with a 400 because it couldn't accept a `redacted_thinking` block that an earlier turn in the conversation history carries.
2701
2702```text theme={null}
2703API Error: 400 ... Invalid `data` in `redacted_thinkin
2698* Run `/rewind`, or press Esc twice, to step back to a checkpoint before the corrupted turn and continue from there. See [Checkpointing](/docs/en
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