Did you check or replace the control board and PSU? I found the same error from this thread
The kernel log posted here is most likely incomplete, the ECC error is misleading, not sure why the link you posted says they changed PSU and Control board to fix that issue, it can't be both of them, it's likely a bad firmware or a mismatched hash board sitting in the miner, the complete log will reveal more info.
@op, please post the complete kernel log and use the code tag when posting it.
<kernel goes here>