Cannot update json data in an iterator?

[McSwan]

Can't seem to change a variable in an iterator or I don't know how to do properly.
Here's what I've tried

json j;

  j["Callback"] = Callback;
  j["CallbackCalled"] = false;

  cout << j.dump() << endl;
  Updating.push_back(j);

...

for (auto it = Updating.begin(); it != Updating.end(); ++it)
  {
          if (!it.value()["CallbackCalled"])
          {
              RunCallback(it.value()["Callback"]);
             //(*it)["CallbackCalled"] = true;  // no!
             //cout << (*it).dump(); // no!
             // auto obj = (*it).find("CallbackCalled");
             // obj.value() = true; // no!
             // Updating["0"]["CallbackCalled"] = true; //no!

             //(*it).emplace("CallbackCalled", true); // no!
             //json j = json::parse((*it).dump());
             //j["CallbackCalled"] = true; // no!

          }

How do I set (*it)["CallbackCalled"] = true; ?

Thanks!

[McSwan]

My bad - The callback function was doing a push_back while it was iterating, which invalidated the iterator