flake parts not mergging

w the full, detailed trace)

       error: The option `flake.modules' is defined multiple times while it's expected to be unique.
       No option has been declared for this flake output attribute, so its definitions can't be merged automatically.
       Possible solutions:
         - Load a module that defines this flake output attribute
           Many modules are listed at https://flake.parts
         - Declare an option for this flake output attribute
         - Make sure the output attribute is spelled correctly
         - Define the value only once, with a single definition in a single module

       Definition values:
       - In `/nix/store/a3sarh8dh343wa08q57ln64l7znklkak-source/modules/hardware-configuration.nix':
           {
             nixos = {
               hw = { };
             };
           }
       - In `/nix/store/a3sarh8dh343wa08q57ln64l7znklkak-source/modules/vw.nix':
           {
             nixos = {
               vw = { };
             };
           }
       Use `lib.mkForce value` or `lib.mkDefault value` to change the priority on any of these definitions.