Hi! Some problem with sync! Can you help?

SYNCHRONIZATION started
2018-12-21 15:53:09.903 [P2P7]  INFO    global  src/cryptonote_protocol/cryptonote_protocol_handler.inl:309     [206.189.25.218:22048 OUT] Sync data returned a new top block candidate: 1 -> 736 [Your node is 735 blocks (1 days) behind]
SYNCHRONIZATION started
2018-12-21 15:53:10.184 [P2P8]  INFO    global  src/p2p/net_node.inl:220        Host 206.189.25.218 blocked.
2018-12-21 15:53:10.263 [P2P7]  INFO    global  src/cryptonote_protocol/cryptonote_protocol_handler.inl:309     [167.99.90.101:22048 OUT] Sync data returned a new top block candidate: 1 -> 736 [Your node is 735 blocks (1 days) behind]
SYNCHRONIZATION started
2018-12-21 15:53:10.544 [P2P6]  INFO    global  src/p2p/net_node.inl:220        Host 167.99.90.101 blocked.
2018-12-21 15:53:10.591 [P2P6]  INFO    global  src/cryptonote_protocol/cryptonote_protocol_handler.inl:309     [142.93.45.215:22048 OUT] Sync data returned a new top block candidate: 1 -> 736 [Your node is 735 blocks (1 days) behind]
SYNCHRONIZATION started
2018-12-21 15:53:10.856 [P2P8]  INFO    global  src/p2p/net_node.inl:220        Host 142.93.45.215 blocked.
2018-12-21 15:53:10.903 [P2P8]  INFO    global  src/cryptonote_protocol/cryptonote_protocol_handler.inl:309     [194.32.79.152:22048 OUT] Sync data returned a new top block candidate: 1 -> 736 [Your node is 735 blocks (1 days) behind]
SYNCHRONIZATION started
2018-12-21 15:53:11.153 [P2P7]  INFO    global  src/p2p/net_node.inl:220        Host 194.32.79.152 blocked.

2018-12-21 15:54:29.856 [P2P8]  WARNING blockchain.db.lmdb      src/blockchain_db/lmdb/db_lmdb.cpp:76   Attempt to get timestamp from height 18446744073709551557 failed -- timestamp not in db
2018-12-21 15:54:33.980 [P2P7]  INFO    global  src/cryptonote_protocol/cryptonote_protocol_handler.inl:1652