Steam - your local dota 2 files conflict with the ones stored in the steam cloud.

When i&trying to run dota 2 on steam (with ubuntu 16.04), a message displaying to me. it say : Steam - Cloud Sync Conflict your local dota 2 files conflict with the ones stored in the steam cloud. I&confused, how to fixing? hm... That message have two choice, (1) download cloud files or (2) upload local files to steam cloud. I&chosen number 1, it will download a some files (not long), and then dota will be running as usually.. yes! enjoy.