Bug fix when creating the first gpx.

src/db/gpx.ts

@@ -421,7 +421,7 @@ export const putGpx = async (params: any) => {
   let { id, gpx } = params;
 
   try {
-    if (id === 'new') {
+    if (id === 'new' || !id) {
       const date = !!gpx.metadata.time
         ? new Date(gpx.metadata.time)
         : new Date();