해결됨
이 주제는 답변이 닫혔습니다.
Another possibility, corrupt preference file.
see:
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html
The preference file can get corrupted leading to buggy behavior. A corrupt preference file will survive uninstalls, updates, and upgrades. By renaming or moving or deleting the preference file you create a situation where LrC will recreate a fresh new one upon startup of LrC. Be aware various settings will revert to defaults.
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