Help: DB120 Board with Meshdesk MAC changing every reboot

Hi anyone, i have db120 board (ALTAI C1N) and installed lede v17.01.0 with Meshdesk package (see i upload it successfully with serial console and everything seems works fine. but when i try to communicate it with MEshdesk server. the Node keeps rebooting and i notice that the MAC address is changing every reboots. Can someone help me? i appreciate a lot.

Duplicate of: Help: db120 board LAN keeps changing MAC address