After upgrading my Synology NAS, I found I was unable to import my cameras back into Surveillance Station, despite both NAS’ running the same application and DSM version.
The fix is straightforward, however it requires you to connect to your NAS via SSH. If you’re unsure how to do this, instructions can be found here.
Once connected, run the below command:
sudo sqlite3 /var/packages/SurveillanceStation/target/system.db "ALTER TABLE camera ADD COLUMN dual_rec_audio_disabled boolean DEFAULT '0';"
Once the above command has ran, you will be able to successfully import your cameras.
Thanks to Reddit user LinLi1986 for the fix.