When i launch bytecashd i cannot sync with blockchain, here is the errror messages :
22:59:16.912599 INFO [90.71.31.68:48734 OUT] Sync data returned unknown top block: 1559 -> 2531 [972 blocks (3 days) behind]
22:59:16.912599 INFO SYNCHRONIZATION started
22:59:17.450178 ERROR CHECKPOINT FAILED FOR HEIGHT 1560. EXPECTED HASH: , FETCHED HASH:
22:59:17.450333 ERROR CHECKPOINT VALIDATION FAILED