claude-code - 💡(How to fix) Fix [Bug] Version downgrade during update: 2.1.120 to 2.1.119 [2 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/tdehnke/.local/share/claude/versions/2.1.119 (expected in multi-process scenarios)\n at mH6 (/$bunfs/root/src/entrypoints/cli.js:2736:2177)\n at E$8 (/$bunfs/root/src/entrypoints/cli.js:2736:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T04:13:29.829Z"}]

TL;DR

The issue might be resolved by checking the lock file for the claude version and potentially removing it to allow the update process to complete successfully.

Guidance

• The error message indicates a lock acquisition failure, which could be due to a stale lock file from a previous update attempt.
• Check the file path /Users/tdehnke/.local/share/claude/versions/2.1.119 for any lock files and consider removing them if present.
• Verify that the update process can proceed without errors after removing any lock files.
• If the issue persists, consider checking the system's file system permissions to ensure that the update process has the necessary access rights.

Example

No code snippet is provided as it's not directly applicable to this scenario.

Notes

The provided error message suggests a non-fatal error, but it still prevents the update from completing successfully. Removing lock files should be done with caution to avoid interfering with other processes that might be using the same files.

Recommendation

Apply workaround: Remove any lock files related to the claude update process to allow it to complete successfully, as the error message specifically points to a lock acquisition failure.