Failed sending Identity

server version " 1.1.14"
client version “1.4.11”

recently i activate two ether net put new ip 172.16.30.109.
ethernet1 : 172.16.36.109
ethernet 2 : 172.16.30.109

but i removed 172.16.30.109 connection after that server showing this error. client side server IP showing 172.16.30.109.

Any option to resolve ?