@Awash-bank then the message is correct!
In the following example, the user configures virtual terminal lines 0 to 4:
line vty 0 4
If you compare this to your config, you have configured:
0 to 4
5 to 15
16
17 to 97
Therefore 0-97 are all in use. I'd suggest you strip some off the end so change the last line to:
live vty 17 90
That should then allow the monitoring to be set up.
If my answer solves your problem please click Accept as Solution so others can benefit from it.