When a device is removed or GTT is closed, parameter sets are automatically saved.
There is currently a limitation on saving parameter sets to databases.
The parameter set is not immediately saved to the database. It is saved in the moment when the device is removed from the device list. Therefore, if the signal flow is modified (for which there is an associated parameter set) when the device is not in device list, the old parameter sets are retrieved from the database when the device is dragged to device list next time.