Binary ‘==’: no operator found? FTransform == FTransform

[Alexa.Ki (Alendromeda.ki)]

now i found this working, generated native blueprint code and filtered 130 lines of code , but this is still not efficient, locations are not correct as expected

if (::IsValid(ItemGroupRef))
    {
        ItemGroupRef->GetAllTransforms(Available);
    }
RandomLocation(Available, Location);
int32 Index = FCustomThunkTemplates::Array_Find(UsedLocations, Location);
bool bIndexDuplicated = UKismetMathLibrary::EqualEqual_IntInt(Index, -1);
	if (!bIndexDuplicated)
	{
		RandomLocation(Available, Location);
	}
	else
		{
			SpawnLocation = Location;
			UsedLocations.Add(SpawnLocation);
		}