Rsync backups up files that have not changed

[Felipe Alvarez]

rsync -b --suffix=.felipe /tmp/file1 /tmp/file2 remote_host:/tmp/

If file1 has not changed, I still get a /tmp/file1.felipe file which is
100% exactly the same as /tmp/file1

Can this be prevented, while still backing up files that have changed?

Cheers,
Felipe
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