Folder already exists when task schedule to a Synology NAS via SFTP

[titanve]

Hello all!

I'm running a scheduled FFS task on Windows Server 2016. The task takes the data from folder A (network shared from windows) and sync (update) to folder B (on a Synology NAS) network shared. The connection is via SFTP. I can use WinSCP and connect via SFTP to the Synology NAS correctly. The batch creates the sync.ffs_lock file and start syncing the folders, but when the time comes again to start the syncing the next day it wont work and shows that the folder on the target already exists. What can I do in order to troubleshoot this problem?

Thank you all in advance for your help.

Best!