I am trying to create a static route between two routers, but I keep getting "Status: invalid" when creating the static route.

Here's the setup on my DrayTek Vigor 2832n:

Firmware: 3.9.1
Router IP (LAN1): 192.168.0.1
Subnet (LAN1): 255.255.255.0/24
Bind IP (LAN1): 192.168.0.5 (for the other router that takes an ethernet connection from DrayTek router, where it is input in its WAN port)

Static route settings:

Destination IP: 192.168.0.5
Subnet Mask: 255.255.255.0/24
Gateway IP: 192.168.0.1
Network Interface: LAN1

How should I put the static route?

The mask would need to be "255.255.255.255". But even if accepted, surely it would do nothing useful anyway? (The router already knows how to route to 192.168.0.5)