450G upgrading from OS 5.21 to 6.1 loss DHCP

hi,

yesterday we upgrade our 450G from 5.21 to 6.1.
we loss our DHCP Config, if I try again to configure it stuck after selecting the interface in winbox and also in terminal.

please help me

thank you,

ven

You should probably netinstall to start fresh and with as few leftover bugs as possible.