Introduced in version 10.1
Integrators will embrace this new feature and backend users will love it for sure: the default action when backend users upload files is now configurable! In previous TYPO3 versions, the default is “Skip this file” if backend users try to upload a file that already exists. This is, of course, the safest option, but TYPO3 v10.1 allows you to re-configure it, making the file upload functionality more flexible and user-friendly. Available options are “replace”, “rename”, and “cancel”.
Documentation