claude-code - 💡(How to fix) Fix [Feature Request] Add option to specify Claude model version [1 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/peter/.local/share/claude/versions/2.1.118 (expected in multi-process scenarios)\n at ai_ (/$bunfs/root/src/entrypoints/cli.js:2756:2177)\n at IK8 (/$bunfs/root/src/entrypoints/cli.js:2756:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-23T15:37:33.562Z"},{"error":"Error: 1: Command failed with ERR_STREAM_PREMATURE_CLOSE: code --force --install-extension anthropic.claude-code\nPremature close \n at jZ1 (/$bunfs/root/src/entrypoints/cli.js:1707:4045)\n at async wZ1 (/$bunfs/root/src/entrypoints/cli.js:1707:1435)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-23T15:37:34.644Z"}]

TL;DR

Downgrade to opus 4.6 to potentially resolve the compatibility issues.

Guidance

• Verify the current version of opus being used and confirm it's indeed 4.7.
• Check the documentation or release notes for opus 4.7 to see if there are any known issues or workarounds for the errors encountered.
• Attempt to downgrade opus to version 4.6 using the appropriate package manager or installation method.
• If downgrading is not feasible, try to identify and isolate the specific feature or functionality causing the issue with opus 4.7.

Example

No code snippet is provided as the issue does not contain sufficient information about the code or implementation details.

Notes

The provided error messages suggest issues with lock acquisition and premature closure, which may be related to the opus version. However, without more context or information about the specific use case, it's difficult to provide a more targeted solution.

Recommendation

Apply workaround: Downgrade to opus 4.6, as the current version (4.7) seems to be causing compatibility issues and breaking functionality.