Below is the specific log when I using config backups_to_keep_remote: 3 to rotate backups stored on S3.
2026-02-03 09:33:13.838 WRN pkg/backup/backuper.go:71 > Will wait near 5.532522239s and retry, error=S3 batch delete failed for batch starting at index 0: DeleteObjects API call failed: operation error S3: DeleteObjects, https response error StatusCode: 400, RequestID: ac1044ee:19b8cc8520a:34818:892f, HostID: 55f9344b87d2cba37d410d59e01a2548bae766e7644ffbbfd464d0e5a3892b0f, api error InvalidRequest: Missing required header for this request: Content-MD5
Is there a way to fix this?