Replicate .system via replication task

[Supose]

As a backup I’d like to replicate my .system dataset to another TrueNAS machine.

I tried setting up a replication task. As .system was not shown in the source dataset list I manually typed myPool/.system. When pressing “START REPLICATION” in the next step TrueNAS told me: “[EINVAL] periodic_snapshot_create.dataset: ZFS dataset or zvol not found”.

What else could I do?

 

[Supose]

Can I even do this via the web interface?