Port Forwarding Minecraft Server

I've sucessfully port forwarded a minecraft server on my router. The problem is, after I updated the firmware, it deleted my port forwarding. So, I tried to re-do it, but now I get the message saying:

Failure


The specified port(s) are being used by other configurations. Please check your configurations of Remote Management, Port forwarding, Port Triggering, UPnP Port Mapping table, RIP, and Internet connection type

Will someone please help? Thanks a lot.