Modul problem: bool GFNameDebuggerVisualizersIsUE3

Hello everyone!
I have weird problem with my project. After copying files from working project my Module class flips out. I am getting " already defined":

bool GFNameDebuggerVisualizersIsUE3" (?GFNameDebuggerVisualizersIsUE3@@3_NA) 
class TArray<class UObjectBase *,class FDefaultAllocator> * GObjectArrayForDebugVisualizers
class TArray<struct FNameEntry const *,class FDefaultAllocator> * GFNameTableForDebuggerVisualizers
class TArray<struct FNameEntry const *,class FDefaultAllocator> * GFNameTableForDebuggerVisualizers
int * * * GSerialNumberBlocksForDebugVisualizers
struct FLogCategoryModuleLog ModuleLog
struct FNameEntry * * * GFNameTableForDebuggerVisualizers_MT
void * __cdecl operator new(unsigned __int64)
void * __cdecl operator new[](unsigned __int64)
void __cdecl operator delete(void *)
void __cdecl operator delete[](void *)

but it is not :[ I did’t define/duplicate them anywhere. now I can not build my project. I tried rebuilding solution, starting with clean project etc.

Maybe there are duplicate files in your folder where this has been declared. Look in the file explorer to resolve such an issue if it exists. Just looking through visual studio solution explorer might not be enough.

Resolved. Now I feel silly. I had TWO Module classes in one folder - older not used and new one. Off course not in solution :confused: darkZ thanks for simple but perfect advice. cheers!