Hwclock totally crazy on mvebu

hello, i just had big trouble getting my network back to run. the problem is that hwclock shows:
Wed Dec 17 14:09:17 2070 0.000000 seconds

that lead unbound to go nuts and i had no dns resolution anymore

anyone an idea wtf is going on here? is this a hardware damage or is there anything i can do?
its a clearfog pro from solidrun.

i fixed it now with date -s 2023 and then hwclock --systohc but i dont want to run into this again, how can i prevent that?