you have to avoid your daemon communicate with v3 of nodes. use dedicated v4 nodes like this:

intensecoind --add-exclusive-node 140.82.9.90:48772 --add-exclusive-node 62.48.164.60:48772 --add-exclusive-node 69.162.83.202:48772 --add-exclusive-node 5.249.27.162:48772 --add-exclusive-node 54.37.87.203:48772

and if possible, use the most recent version of daemon, i had a strange blockchain overload errors until I compiled a newest one from git repository a hour ago