Rsync options for reverse syncing

[H]

I am running the current version of rsync on Androic CM 11.2 and 12.1 on 
phones and tablets. While syncing to a server works fine, I am having 
problems with reverse syncing, specifically having the date and time set 
for files on the reverse sync.

Currently the flags are "rsync - vHrlt --chmod=Du+rwx, go-rwx, Fu+rw, 
go-rw --no-perms -e "ssh -y -p 22 -i '...'...* source destination" and 
the error message is "rsync: failed to set times on ... operation not 
permitted (1)". Since rsync is able to transfer the files, where lies 
the problem with setting times?

Thank you.