Remote Desktop Error "You have been disconnected because another connection was made to the remote computer"

Question

I keep getting disconnected during my remote desktop sessions with the error "you have been disconnected because another connection was made to the remote computer" after a random period of time. I'm unsure what exactly this error means, the Event Viewer shows no other sessions besides my own and there shouldn't be any other connections made to this computer anyway. Trying to solve this I did disable any limits to the number of remote sessions in the Group Policy Editor but the problem still occurs.

The remote system is on my local network and is running an older version of Windows 10 Pro (1511) and can't be updated for now due to stability issues, the system I'm using is running Windows 10 Pro build 20H2. I did have to change some settings to get the newer system to connect at all to the older one, but it runs smoothly until I am randomly disconnected.

If anyone has a clue what could be causing this problem or how to fix it I'll be very grateful, this is causing me to pull my hair out. Google has turned up a couple other posts about this issue but none of them have had a response that worked for me.

Answer 1

Did some more tinkering. I was running the remote system without a password protected account. Setting a password for that machine's account did fix the issue, but it's so odd that would cause a problem like this. I've definitely used Remote Desktop before with a system that didn't use a password and never encountered issues like this.