How to setState to prevState?

When I press a button

<Pressable
            onPress={() => {
              this.onPressHandler();
            }}>

I want to setState to its previous value, but it doesn’t happen

onPressHandler = () => {
    this.setState(
      prevState => (
        {
          data: prevState.data
        }
      )
    );
  };

What am I doing wrong?