claude-code [Bug] File Modification Conflict: Unexpected Write Prevention Mechanism

Bug Description Claude Code keeps sending me this error: Error: File has been unexpectedly modified. Read it again before attempting to write it. when tries to update any file

Environment Info

Platform: win32
Terminal: mintty
Version: 1.0.119
Feedback ID: 1e2d0040-92a8-41c2-8b98-a80ed4383cbe

Errors

[{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1902:782)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async kW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:21036)\n    at async tEB (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:17318)\n    at async SW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:16181)\n    at async PW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:15718)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:12733)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)","timestamp":"2025-09-19T12:07:27.484Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1903:3154)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async kW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:21036)\n    at async tEB (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:17318)\n    at async SW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:16181)\n    at async PW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:15718)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:12733)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)","timestamp":"2025-09-19T12:09:32.589Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1903:3154)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async kW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:21036)\n    at async tEB (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:17318)\n    at async SW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:16181)\n    at async PW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:15718)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:12733)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)\n    at async dO (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:13646)","timestamp":"2025-09-19T12:15:06.276Z"},{"error":"Error: File has been unexpectedly modified. Read it again before attempting to write it.\n    at Object.call (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1903:3154)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async kW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:21036)\n    at async tEB (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:17318)\n    at async SW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:3350:16181)\n    at async PW5 (file:///C:/Users/luizr/AppData/Roaming/npm/node_modules/@anthropic

Note: Error logs were truncated.

Sep 19 '25 14:09 luizrossetti

Found 3 possible duplicate issues:

https://github.com/anthropics/claude-code/issues/7457
https://github.com/anthropics/claude-code/issues/7593
https://github.com/anthropics/claude-code/issues/7446

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Sep 19 '25 14:09 github-actions[bot]

#7935 #7920 #7918

Sep 20 '25 14:09 JosiahSiegel

Any update on this?

Nov 24 '25 05:11 dylanh724

This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.

Dec 24 '25 10:12 github-actions[bot]

Do not close. This is still an active issue.

Dec 24 '25 13:12 JosiahSiegel