Apparently around TS2009 the snapmode tag values seem to have been changed from 1 and 2 to 0 and 1. If you use a 1 your ok but a 2 generates an error along the lines of: snapmode is not a Boolean value (0 or 1). Its been this way since 2009 but N3V hasn't bothered to fix it.
As for deleting it - give it a try and see what happens. You can always put it back.
Ben