Linux + XML file + parser error + how to remove some illegal character as @

when I try to edit the XML file from Linux machine by VI

I see many @ characters

is that characters are valid , or need maybe to remove them?

but when I try to remove them , I can’t because VI editor cursor cannot point on @ characters

maybe some other command that can clean the @ ?

<?xml version="1.0"?>
<root version="3.0">
<Networks>

 <units><unit ip="10.190.74.23" unit_type="Auto Discovery"/><unit ip="10.122.14.31" unit_type="Auto Discovery"/><unit ip="10.106.164.
  113" unit_type="Auto Discovery"/><unit ip="18.120.14.29" unit_type="Auto Discovery"/><unit ip="10.6.164.122" unit_type="Auto Disco
 very"/></units><ranges/></Networks>

@
@
@