Sync without deletion

Hi
the manual https://www.noodlesoft.com/manual/hazel/advanced-topics/syncing-folders/ stated quite clearly that "Deletions are not synced (by default)" - which is exactly what I was looking for.
However, when I setup as sync rule files are being deleted in the destination folder if they are deleted in the source folder.
I am currently evaluating Hazel and the rule I have designed is very simple and looks like this:

I have a folder (Nayuku Primary School), which I am syncing to my Synology (Nayukutemp) and because I want to include the subfolders, I run the rule also on folder contents.
However, when I delete a file on the source it is also deleted in the destination. But I want to keep all files no matter whether they have been deleted in the source or not - as described in the manual.
What am I doing wrong here?
Thanks a lot!
the manual https://www.noodlesoft.com/manual/hazel/advanced-topics/syncing-folders/ stated quite clearly that "Deletions are not synced (by default)" - which is exactly what I was looking for.
However, when I setup as sync rule files are being deleted in the destination folder if they are deleted in the source folder.
I am currently evaluating Hazel and the rule I have designed is very simple and looks like this:

I have a folder (Nayuku Primary School), which I am syncing to my Synology (Nayukutemp) and because I want to include the subfolders, I run the rule also on folder contents.
However, when I delete a file on the source it is also deleted in the destination. But I want to keep all files no matter whether they have been deleted in the source or not - as described in the manual.
What am I doing wrong here?
Thanks a lot!