MacOS: chain does'n sync


i open my peercoin wallet (11.8) after a long time and try to sync.
unfortunately, it will not continue until february 1, 2023.
Headers: 714687

i check the debug.log and get:

ERROR: AcceptBlockHeader: Consensus::ContextualCheckBlockHeader: 0000000000000000bef29f005dc65af3950b14af7200998759ba8977561f9d95, bad-diffbits, incorrect proof of work/stake

what can I do now

best regards

Please update to 0.12.7 and try again