I'm getting error in making a plot with geom\_point. 

```
library(ggplot2)
theme_set(theme_bw())

mtcars$`car name` <- rownames(mtcars) 
mtcars$mpg_z <- round((mtcars$mpg - mean(mtcars$mpg))/sd(mtcars$mpg), 2)  
mtcars$mpg_type <- ifelse(mtcars$mpg_z < 0, "below", "above") 
mtcars <- mtcars[order(mtcars$mpg_z), ]  # sort
mtcars$`car name` <- factor(mtcars$`car name`, levels = mtcars$`car name`) 

ggplot() + 
  geom_point(data=mtcars, aes(x=`car name`, y=mpg_z,label=mpg_z), stat='identity', fill="black", size=6)  +
  geom_text(color="white", size=2) +
  labs(title="Diverging Lollipop Chart", 
       subtitle="Normalized mileage from 'mtcars': Lollipop") + 
  ylim(-2.5, 2.5) +
  coord_flip() 

```

But I was not able to put numbers inside of the points and having the error: 

```
Warning: Ignoring unknown aesthetics: label

```

The plot is here. Thank you in advance!!!
[![enter image description here](https://i.stack.imgur.com/O0iWx.png)](https://i.stack.imgur.com/O0iWx.png)