What does it mean when a pop up comes up and says that someone else is using the same IP address as myself?

It only comes up a couple times, but what does it mean? Does it mean I've been hacked or something? It also says to change my IP address if it happens again but how the heck do I do that? I don't even know how to contact my network manager to find out what's going on? Is this something I really need to worry about? Please help I need to know what's going on?! Thank you!

It means that your router doesn't assign IP addresses based on a hash of the devices MAC address but instead assigns them in sequential order.
On Monday device A had IP address X and device B had IP address Y because they were turned on in the order A then B.
On Tuesday device B was turned on first and it got IP address X for whatever reason.
When devfice A was turned on it asked for IP address X but was rejected because X was already in use.
That's when the error message was displayed. It's complaining that the IP address it had yesterday isn't available today because it's already in use by another device.
If the router has the ability to do DHCP reservations, configure the router to assign IP addresses based on the device's MAC address.
Or always turn devices on in the same order.
Or get a high end router.

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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
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What does it mean when a pop up comes up and says that someone else is using the same IP address as myself?

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