Unique_ptr and Game State changes

[true zenith]

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[jolly elm]

CStateManager::CStateManager(sf::RenderWindow& Window) :
    mState(nullptr),
    mGameplay(std::make_unique<CGameplay>(Window)), 
    mTitle_Screen(std::make_unique<CTitle_Screen>(Window))
{}

auto CStateManager::set_state(std::unique_ptr<CState> State) -> void
{
    mState = std::move(State);
}

auto CStateManager::get_gameplay() -> std::unique_ptr<CGameplay>
{
    return std::make_unique<CGameplay>();
}

auto CStateManager::get_title_screen() -> std::unique_ptr<CTitle_Screen>
{
    return std::make_unique<CTitle_Screen>();
}

class CStateManager
{
private:
    std::unique_ptr<CState> mState;
    std::unique_ptr<CGameplay> mGameplay;
    std::unique_ptr<CTitle_Screen> mTitle_Screen;

and when i try to StateManager.set_state(StateManager.get_title_screen()); vs22 passes me a C++ no suitable user-defined conversion from to existserror

[true zenith]

@jolly elm

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[jolly elm]

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