Help me please Sb5101 docsis entered bad macs now locked out

Ok so I had full access
Was trying to change the Mac to get back online
And I have made a mistake
All macs that were listed on modem started with 00-
I changed them from 00- to A7- saved and restarted modem and I can no longer
Access the configuration area any and all help would be great
I have no clue what to do and I'm open for advice

Hope I'm not the only one that did this


Thank you for anything that may help

Newbie mistake