github.com/cs3org/reva/v2@v2.27.7/changelog/2.0.0_2022-03-03/storage-if-match.md (about)

     1  Enhancement: Add an if-match check to the storage provider
     2  
     3  Implement a check for the if-match value in InitiateFileUpload to prevent overwrites of newer versions.
     4  
     5  https://github.com/cs3org/reva/pull/2547