Fixed sectree not found while loading guild buildings

src/game/src/building.cpp

@@ -815,6 +815,11 @@ CLand * CManager::FindLandByGuild(DWORD GID)
 
 bool CManager::LoadObject(TObject * pTable, bool isBoot) // from DB
 {
+	// Skip loading if the target map is not available on this core
+	// Source: https://metin2.dev/topic/23614-solving-a-very-old-problem-what-most-people-ignore/#comment-163073
+	if (!map_allow_find(pTable->lMapIndex))
+		return false;
+
 	CLand * pkLand = FindLand(pTable->dwLandID);
 
 	if (!pkLand)