Objects have the same fully qualified name but different paths.

When I try to launch my project I get the following error:

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 3176]

Objects have the same fully qualified name but different paths.

New Object:
LotwigCPPTutorialGameModeBase /Script/LotwigCPPTutorial.Default__LotwigCPPTutorialGameModeBase
Existing Object:
LotwigCPPTutorialGameModeBase /Script/LotwigCPPTutorial.Default__LotwigCPPTutorialGameModeBase

Where is the D:\build\ folder? I can’t find it.
And how can I fix this error? I saw 5 other posts from people having this problem but their problems where slightly different.