failed when refreshing routing table

How can this problem be solved?

2020-07-15T14:06:37.116+0800 WARN dht/RtRefreshManager rtrefresh/rt_refresh_manager.go:191 failed when refreshing routing table {“error”: “2 errors occurred:\n\t* failed to query for self, err=failed to run refresh DHT query for key=\u0000$\u0008\u0001\u0012 \ufffd\u001dڶFɘrU\ufffd\u0015N\u000b \ufffd\ufffd\u001bu^ \ufffdT\ufffd\ufffd`\ufffdy񝒄\ufffd, err=failed to find any peer in table\n\t* failed to refresh cpl=0, err=failed to run refresh DHT query for key=\u0012 \u0000\u0001\ufffd\ufffd\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000, err=failed to find any peer in table\n\n”}