why this code generates two destructor

i tried with std::move , same thing
the only reasonable result is when I use vector of pointers

#include 
#include 
#include 

class Obj {
    public:
    static int gen_id;
    int id;
    Obj()
    {
        id = gen_id;
        std::cout << "Hello from Obj: " << Obj::id << " " << this<< "\n";
        gen_id++;
    }
    ~Obj()
    {
        std::cout << "Mdying : " << Obj::id << " " << this << "\n" ;
    }
};

int Obj::gen_id = 0;

int main()
{
    std::vector v;
    
    Obj o = Obj();
    
    v.push_back(std::move(o));
}