Port forward rule not listed

Hello,

I have an MR60 wireless mesh system. I have created a port forwarding rule under advanced setup / port forwarding / port triggering but I do not see it in the list of service names. 

I thought it might not be setup, so I tried to add it again, but I am to do so because it the system tells me there is a "port conflict with other service". I cannot edit or delete the rule because it does not appear on the list of service names, either under port forwarding or port triggering.

Is there a way to resolve this issue?

Thanks in advance.