diff --git a/src/components/dashboard/Dashboard.tsx b/src/components/dashboard/Dashboard.tsx
index 59daa72..f955af6 100644
--- a/src/components/dashboard/Dashboard.tsx
+++ b/src/components/dashboard/Dashboard.tsx
@@ -40,7 +40,8 @@ export function Dashboard() {
   });
   const { data: maps = [] } = useQuery({ queryKey: ["maps"], queryFn: getGroupMaps });
 
-  const mappedIds = new Set(maps.map((m) => m.project_id));
+  const projectIds = new Set(projects.map((p) => p.id));
+  const mappedIds = new Set(maps.map((m) => m.project_id).filter((id) => projectIds.has(id)));
   const standalone = projects.filter((p) => !mappedIds.has(p.id));
 
   return (