cannot sync block

[liuxh-go]

code version : v3.1.0

log

2020-12-17 03:14:14.984	[P2P1]	WARN 	global	src/cryptonote_core/cryptonote_core.cpp:1401	**********************************************************************
2020-12-17 03:14:14.984	[P2P1]	WARN 	global	src/cryptonote_core/cryptonote_core.cpp:1402	Last scheduled hard fork is too far in the past.
2020-12-17 03:14:14.984	[P2P1]	WARN 	global	src/cryptonote_core/cryptonote_core.cpp:1403	We are most likely forked from the network. Daemon update needed now.
2020-12-17 03:14:14.984	[P2P1]	WARN 	global	src/cryptonote_core/cryptonote_core.cpp:1404	**********************************************************************
2020-12-17 03:15:35.258	[P2P1]	WARN 	net.dns	src/common/dns_utils.cpp:509	WARNING: no two valid MoneroPulse DNS checkpoint records were received