VVX 400 unable to register or retrieve an IP address

I accidentally did something dumb! I was switching some phones around in our conference room when I accidentally plugged in the ethernet cable of an analog Soundstation POE adapter into the ethernet port of a VVX 400 IP Phone with an active power supply. I quickly switched the ethernet cables after realizing it. However, now the VVX 400 won't register or pick up an IP address. The VVX 400 phone powers on just fine. It's just when registering there's a problem.

Any thoughts on how to resolve this?

Thanks again