I suspect that what you are seeing there is the IP address assigned to the NVR PoE port.
A suggestion to try:
Pick one of the PoE ports, note down the IP address currently assigned, change the mode to 'Manual' instead of Plug&Play.
Plug the camera into the LAN again, and with SADP change the IP address to that of the PoE port you picked above, with default gateway=192.168.254.1
Plug the camera into that PoE port.
On the NVR PoE port camera configuration, use 'Modify' to ensure the IP address is as it was originally, as was set on the camera.
The protocol=Hikvision, the port=8000, the username and password are as you used when the camera was on the LAN.
Click OK and check Live View to see if the camera now shows.
Good luck!