std::mutex as class member, and store class obect to container

Below is minimal code to reproduce the error.

#include <iostream>
#include <mutex>
#include <vector>

class A {
    std::mutex mutex;
    public:
    A(){};
};
int main() 
{
    std::vector<std::pair<std::string,A>> aa;
    A a;
    //aa.push_back(std::make_pair(std::string("aa"),A()));
    //aa.push_back(std::make_pair(std::string("aa"),a));
    aa.push_back(std::make_pair(std::string("aa"),std::move(a)));    
}

Below is error.

Microsoft (R) C/C++ Optimizing Compiler Version 19.16.27026.1 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.
 
 
C:\Program Files (x86)\Microsoft Visual
 Studio\2017\Community\VC\Tools\MSVC\14.16.27023\include\xlocale(319):
warning C4530: C++ exception handler used, but unwind semantics are
not enabled. Specify /EHsc  C:\Program Files (x86)\Microsoft Visual
 Studio\2017\Community\VC\Tools\MSVC\14.16.27023\include\utility(405):
error C2440: '<function-style-cast>': cannot convert from 'initializer
list' to '_Mypair'  C:\Program Files (x86)\Microsoft Visual
 Studio\2017\Community\VC\Tools\MSVC\14.16.27023\include\utility(405):
note: No constructor could take the source type, or constructor
overload resolution was ambiguous
    ..\examples\json_object\json.cpp(16): note: see reference to function
template instantiation 'std::pair<std::string,A>
std::make_pair<std::string,A>(_Ty1 &&,_Ty2 &&)' being compiled          with
            [
                _Ty1=std::string,
                _Ty2=A          ]

Similar error for gcc compiler. When I remove std::mutex from class OR don't push the object on std::vector, then it compiles fine.

As pointed by P.W and hint provided by freakish I come up with below solution.

#include <iostream>
#include <mutex>
#include <vector>
#include <memory>

class A {
    std::mutex mutex;
    public:
    A(){};
};
int main() 
{
    std::vector<std::pair<std::string,std::shared_ptr<A>>> aa;
    A a;
    //aa.push_back(std::make_pair(std::string("aa"),A()));
    //aa.push_back(std::make_pair(std::string("aa"),a));
    aa.push_back(std::make_pair(std::string("aa"),std::make_shared<A>()));   
}

I modified my container to store smart pointer of object instead of object itself.