TP-Link TL-SG1016DE los MAC address

[skooter]

Model :

Hardware Version :

Firmware Version :

ISP : [/COLOR]

One of my TL-SG1016DE v1 lost its MAC address. It is 00-00-00-00-00-00. It is still acessible by the default IP address.

How can I put the MAC address back again?

[skooter]