compiler error: is private within this context only on gcc9 with c++17

I test my code using travis. Recently someone added gcc9 to the set of compilers the code gets tested with. While everything compiles fine with gcc8 (both with c++14 and c++17) and gcc-9.1.0 with c++14 it fails with gcc-9.1.0 with c++17 with the following error:

/usr/include/c++/9/functional: In instantiation of ‘std::_Bind<_Functor(_Bound_args ...)>::_Bind(const _Functor&, _Args&& ...) [with _Args = {std::tuple<int>}; _Functor = SQLite::Statement; _Bound_args = {std::tuple<int>}]’:
/usr/include/c++/9/functional:811:38:   required from ‘typename std::_Bind_helper<std::__is_socketlike<_Func>::value, _Func, _BoundArgs ...>::type std::bind(_Func&&, _BoundArgs&& ...) [with _Func = SQLite::Statement&; _BoundArgs = {std::tuple<int>}; typename std::_Bind_helper<std::__is_socketlike<_Func>::value, _Func, _BoundArgs ...>::type = std::_Bind<SQLite::Statement(std::tuple<int>)>]’
/home/travis/build/SRombauts/SQLiteCpp/include/SQLiteCpp/ExecuteMany.h:84:9:   required from ‘void SQLite::bind_exec(SQLite::Statement&, std::tuple<_Tps ...>&&) [with Types = {int}]’
/home/travis/build/SRombauts/SQLiteCpp/include/SQLiteCpp/ExecuteMany.h:50:14:   required from ‘void SQLite::execute_many(SQLite::Database&, const char*, Arg&&, Types&& ...) [with Arg = std::tuple<int>; Types = {std::tuple<int, const char*>, std::tuple<int, const char*>}]’
/home/travis/build/SRombauts/SQLiteCpp/tests/ExecuteMany_test.cpp:35:9:   required from here
/usr/include/c++/9/functional:462:59: error: ‘SQLite::Statement::Statement(const SQLite::Statement&)’ is private within this context
  462 |  : _M_f(__f), _M_bound_args(std::forward<_Args>(__args)...)
      |                                                           ^
In file included from /home/travis/build/SRombauts/SQLiteCpp/include/SQLiteCpp/Column.h:13,
                 from /home/travis/build/SRombauts/SQLiteCpp/include/SQLiteCpp/Database.h:13,
                 from /home/travis/build/SRombauts/SQLiteCpp/tests/ExecuteMany_test.cpp:13:
/home/travis/build/SRombauts/SQLiteCpp/include/SQLiteCpp/Statement.h:696:5: note: declared private here
  696 |     Statement(const Statement&);

the code that throws this error is the following:

template <typename Arg, typename... Types>
void execute_many(Database& aDatabase, const char* apQuery, Arg&& aArg, Types&&... aParams)
{
    Statement query(aDatabase, apQuery);
    bind_exec(query, std::forward<Arg>(aArg));
    (void)std::initializer_list<int>
    {
        ((void)reset_bind_exec(query, std::forward<Types>(aParams)), 0)...
    };
}

template <typename TupleT>
void reset_bind_exec(Statement& apQuery, TupleT&& aTuple)
{
    apQuery.reset();
    bind_exec(apQuery, std::forward<TupleT>(aTuple));
}

template <typename TupleT>
void bind_exec(Statement& apQuery, TupleT&& aTuple)
{
    bind(apQuery, std::forward<TupleT>(aTuple));
    while (apQuery.executeStep()) {}
}

I use the following code for travis CI to use the corresponding compiler

matrix:
  include:
    - compiler: gcc
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-9
      env:
        - CC=gcc-9
        - CXX=g++-9
        - CXXFLAGS="-std=c++17 -Wall -Wextra -pedantic"

before_install:
  # coveralls test coverage:
  - if [[ "$CXX" == "g++" ]]; then pip install --user cpp-coveralls ; fi

# scripts to run before build
before_script:
  - gcc --version
  - mkdir build
  - cd build
  - cmake -DCMAKE_BUILD_TYPE=Debug -DSQLITECPP_USE_GCOV=ON -DSQLITECPP_BUILD_EXAMPLES=ON -DSQLITECPP_BUILD_TESTS=ON ..

# build examples, and run tests (ie make & make test)
script:
  - cmake --build .
  - ctest --verbose --output-on-failure

the class Statement has a private copy constructor and assignment operator, but I wonder why this would cause any issue here, because I do not copy the Statement "query". Especially why this problem only occurs with gcc-9.1.0 with c++17 (on my local machine I use gcc-9.1.1 and it compiles without any errors).