change line vty

in CCNA & CCENT
I have configed :
line vty 0
&
line vty 1 4 ..
how do I get get back to only line vty 0 4? "no line vty 1 4" gives "cant delete last 5 lines".
line vty 0
&
line vty 1 4 ..
how do I get get back to only line vty 0 4? "no line vty 1 4" gives "cant delete last 5 lines".
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