Using std::vector's emplace with const reference member

I was using emplace_back on a vector of my class A that has a const reference member variable of class Handle with some success. However I needed to change it to use emplace instead to be able to insert at certain index. But that doesn't seem to compile. Looking at cppreference, I can't tell what the difference between the two methods is, except that one takes an explicit iterator

#include <vector>

class Handle
{
    int do_something();
};

class A
{
public:
    A(int a, float d, const Handle& h) : a_(a), d_(d), h_(h) {}
private:
    int a_;
    float d_;
    const Handle& h_;
};

int main()
{
    Handle h;
    std::vector<A> foo;
    foo.reserve(10);
    foo.emplace_back(3, 4.5, h); // OK
    // foo.emplace(foo.begin() + 3, 3, 4.5, h); // NOT OK
}

I get an error on using emplace :

In file included from main.cpp:7:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/vector:1759:18: error: object of type 'A' cannot be assigned because its copy assignment operator is implicitly deleted
            *__p = _VSTD::move(__tmp.get());
                 ^
main.cpp:41:6: note: in instantiation of function template specialization 'std::vector<A>::emplace<int, double, Handle &>' requested here
        foo.emplace(foo.begin() + 3, 3, 4.5, h);
            ^
main.cpp:22:16: note: copy assignment operator of 'A' is implicitly deleted because field 'h_' is of reference type 'const Handle &'
        const Handle& h_;

Do I need to change my class design to accommodate using emplace?

I found this question but it doesn't seem to provide an alternative