The name of a 70's movie that has an evil vantriloquist doll named Erin.?

I remember they tear it up and put it in the toy box and the doll puts
itself back together and cuts down all the roses in the garden. In the
end the parents remember the nurse saying that they have a baby boy
(but all this time they have had a girl). In the end of the movie the
girl has on a boys sailor suit just like the doll wore.
It was a tv movie.
It was a tv movie.
It was a tv movie.
It was a tv movie.