claude-code - 💡(How to fix) Fix [Bug] SessionStart hook error: EEXIST when creating plugin data directories

[{"error":"Error: Plugin MCP server error - generic-error: EEXIST: file already exists, mkdir 'C:\Users\Admin\.claude\plugins\data\code-review-graph-code-review-graph'\n at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T10:21:27.449Z"},{"error":"Error: Plugin MCP server error - generic-error: EEXIST: file already exists, mkdir 'C:\Users\Admin\.claude\plugins\data\code-review-graph-code-review-graph'\n at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n at async G (B:/~BUN/root/src/entrypoints/cli.js:6187:11023)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T10:21:29.487Z"},{"error":"Error: Plugin MCP server error - generic-error: EEXIST: file already exists, mkdir 'C:\Users\Admin\.claude\plugins\data\code-review-graph-code-review-graph'\n at PjH (B:/~BUN/root/src/entrypoints/cli.js:2807:30077)\n at async V (B:/~BUN/root/src/entrypoints/cli.js:6187:11830)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-20T10:21:29.488Z"}]

TL;DR

The most likely fix is to remove or rename the existing directories that are causing the "file already exists" error.

Guidance

• Check the directories C:\Users\Admin\.claude\plugins\data\code-review-graph-code-review-graph and C:\Users\Admin\.claude\plugins\data\codex-openai-codex to see if they are empty or can be safely removed.
• If the directories are not empty, consider renaming them to a different name to avoid conflicts.
• Verify that the plugin is configured to create the directories with the correct permissions.
• Check the plugin documentation to see if there are any specific instructions for handling directory creation errors.

Example

No code snippet is provided as it is not clearly supported by the issue.

Notes

The issue seems to be related to a plugin trying to create directories that already exist. The solution may vary depending on the specific plugin and its configuration.

Recommendation

Apply workaround: remove or rename the existing directories to avoid conflicts, as the issue is likely caused by a directory creation error.