Snapshots disapear after Replication Task on destination TrueNas

[bjoern_wendt]

Hello,
I'am Bjoern and i have two TrueNAS-12.0-U1 Systems in Place. The first is the primary and the second is Backup System.
On the Primary system i have replication Task in place over SSH to the secondary system.

Transport:
SSH
Source Dataset:
pool-SSD-Primary/Profile,pool-SSD-Primary/Daten,pool-SSD-Primary/User,pool-SSD-Primary/Sommer
Target Dataset:
pool-SSD-Secondary
Recursive:
false

On the Secondary system i create sometimes manual Snapshots of the Dataset ("/Sommer") for Backup to an USB Dataset (Offsite Bakup)
Every time the Replication task is running, on the secondary system, disapear the manual created Snaphots. Only the "@auto-" Snapshot from the Primary are visible.
Manual Snapshot names:
pool-SSD-Secondary/Sommer@autoEXTBackup-20210115-194434 0B - 1.28G -
pool-SSD-Secondary/Sommer@EXTBackup 0B - 1.28G -

The Settings from the task is visible at attach file.

I have search this forum and search in Internet for the resolution.

I hope i get here the answer for this problem.

Thanks and best regards
Bjoern