I'm getting an issue with Resource being edited by another user, but the it's the same user trying to open and edit the resource.
There are no other designers open.
I tried duplicating the windows, deleting the old ones, but when I rename the new ones, the issue comes back.
I tried editing and saving.
Nothing clears this. Any ideas?
This is a known issue, restarting the gateway solves this.
Here are a couple refrence posts should you want to read through them:
Phantom Designer Sessions - Ignition - Inductive Automation Forum
doesn't solve it. just makes it go away until your websocket gets killed again. but it does help reduce project 'weirdness'. it's just irritating to have to restart it several times a day when you're in heavy, multi-user development. 
Hi,
Does anyone know of a way to resolve this issue without restarting the gateway? This problem has occurred on a gateway running a Dairy plant, and they cant just restart the gateway when this happens. Is there any way to override the "Other" user that is editing?
Thanks,
That means you shouldn't be pointing designers at this production system for regular development. Use a server elsewhere, isolated from the process, to develop on. In trial mode if necessary.
It doesn't limit you from editing the resource, it's just a warning that you may need to resolve conflicts when you try to save