Yes, your externalip is wrong, correct one is 146.60.250.143
And you don't even need to set that argument, it's usually auto-detected. But when you set it, it has to be correct.
also my config must be looking so
rpcallowip=127.0.0.1
rpcuser=youuuu
rpcpassword=fuuuuuu
server=1
daemon=1
listen=1
staking=0
port=9999
masternode=1
masternodeaddr=146.60.250.143:9999
masternodeprivkey=??
externalip=146.60.248.143
addnode=104.236.4.12
addnode=62.162.181.2
addnode=93.103.73.22
addnode=78.20.126.124
addnode=188.166.83.211