[Boost-users] error: template argument for template type parameter must be a type template< class Allocator = std::allocator< none > >

Greetings, I try to port a c++ project to a new environment with clang++-17, libcxx 17 and std=c++17 for x64 Linux. Also, I switched form boost 1.65 to 1.84. Now I start getting errors in boost itself: /workspace/usr/include/boost/statechart/fifo_worker.hpp:55:45: error: template argument for template type parameter must be a type 55 | template< class Allocator = std::allocator< none > > As far as I know this has to do with deprecation of some variable type in allocator. Any ideas how I might fix this on short notice? Regards