Too many fingerprints match this host

[fwtester]

Running and Nmap scan against my software firewall using these commands
nmap -sS -sU -p- -sV -sZ -v 192.168.1.3

In the results there was a line that stated "Too many fingerprints match this host to give specific OS details" What does that mean?

Thanks

[Archangel-Amael]

Too many fingerprints match this host to give specific OS details

A better question, since you obviously have no idea what you are doing, is why are you using a tool you don't know how to use.
The error is the message. I suggest you learn a bit more before you wind up drunk, in jail or pregnant.