Is it possible to replace a graph that already has a name?

[John Williamss]

Suppose I draw a graph by

line y x, name(x1)

I want to redraw on the same graph. But this does not work:

line y2 x2, name(x1) replace

How can I achieve this?

[Nick Cox]

Should be

...,  name(x1, replace) 

help name option

[John Williamss]

Should be

..., name(x1, replace)

help name option

Thank you