Two OneDrive Instances

Here is a screenshot of the said problem

To clarify you are seeing these as actual drives and not under Quick Access right?

You can have any # of OneDrive accounts hooked up at once. All you need is separate emails for each one. In the task bar you should have a separate icon for each instance of OneDrive running. Open each one and then go to Settings. Under Account unlink the one(s) you don't want to use on this machine. Alternatively you can right click the OneDrive drive in Explorer and select OneDrive \ Settings to get to the same spot.

Now if you happen to have 2 instances for the same account then something is messed up. The easiest workaround is to probably unlink the accounts and then add them back.

If this just started happening then it might have been triggered by a Windows update. If you haven't rebooted yet then it might be a simple reboot to fix the problem. If you recently installed updates then the cache may be messed up. Go to Credentials Manager and then Windows Credentials. Delete anything mentioning OneDrive and then restart. Worse case it might need you to authenticate back with OneDrive but otherwise OneDrive should hook back up. This will clear out any outdated cache that is getting in the way.

If that still doesn't help then I'd start wondering about the OneDrive backup settings. I don't use it myself but I've heard it can cause problems on ocassion. Not sure about duplicate entries though.