GGplot2 How to change outlier shape per boxplot group?

I would like to distinguish every boxplot’s outliers by shape. For example boxplot 1 uses crosses, boxplot 2 uses circles etc.
I tried to achieve this by doing

ggplot(diamonds, aes(x = cut, y = price)) + geom_boxplot(outlier.shape = c(0, 1, 2, 3, 4))

and by simply doing

ggplot(diamonds, aes(x=cut, y=price, shape=cut)) + geom_boxplot()

Both options fail. How can I achieve different outlier shapes for each boxplot?

>Solution :

You could use the outlier.shape argument have to assign them by NULL like this:

library(ggplot2)
ggplot(diamonds, aes(x=cut, y=price, shape = cut)) + 
  geom_boxplot(outlier.shape=NULL)

^{Created on 2023-10-27 with reprex v2.0.2}