Very weird message on my mac

A banner appeared on the screen with the following message: 192.168.02 in use by 00:21:e9:95:42eb,DHCP server 192.168.0.1
It seems very strange, should I be worried?

HI,
Not to worry. Try this and see if that dialog disappears.
If you are set up to receive your IP address using DHCP, you can force your computer to renew your current IP address.
This might be helpful in an environment where many computers use the same DHCP server, or the network administrator has set up a short DHCP lease time.
Choose Apple > System Preferences, and then click Network.
Choose your connection service that uses DHCP from the list (such as Ethernet or AirPort).
Click Advanced, click TCP/IP, and then click Renew DHCP Lease.
DHCP - What is it?
Carolyn

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    -----BEGIN PGP SIGNED MESSAGE-----
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