How to call two &self mut mutating methods?

Question

This is a simplified version of what I'm trying to do.

struct Foo<'a> {
    data: &'a str
}

impl<'a> Foo<'a> {
    fn foo(&'a mut self) {
        todo!()
    }
    
    fn bar(&'a mut self) {
        todo!()
    }
    
    fn baz(&'a mut self) {
        self.foo();
        self.bar();
    }
}

playground

I'm trying to call two self mutating methods more than once the but it doesn't compile. What is wrong with this code? Why I should not call self mutating methods more than once?

Wrapping the code with unsafe{} didn't make the error go away. How to get around this error if I decide that I want to do the multiple self mutating calls anyway?