diff --git a/src/db-admin/health-legacy.ts b/src/db-admin/health-legacy.ts
index e8ef099..75e63f7 100644
--- a/src/db-admin/health-legacy.ts
+++ b/src/db-admin/health-legacy.ts
@@ -234,7 +234,7 @@ export const watchDbLegacy = async () => {
         localPurges._deleted = true;
         await db.put(localPurges);
       } catch (error) {
-        console.warn({ caller: 'watchDbLegacy / _local/purges', error });
+        //        console.warn({ caller: 'watchDbLegacy / _local/purges', error });
       }
 
       const deletedDocs = await getDeletedDocs();
@@ -274,7 +274,12 @@ export const watchDbLegacy = async () => {
           }
         }
       }
-      if (i !== deletedDocs.length) {
+      console.log({
+        caller: 'watchDbLegacy / purge',
+        nbDeletedDocs: i,
+        nbDocsToDelete: deletedDocs.length,
+      });
+      if (i === deletedDocs.length) {
         await sleep(60000);
       }
     }
diff --git a/src/db/gpx.ts b/src/db/gpx.ts
index 36ac110..288cdaf 100644
--- a/src/db/gpx.ts
+++ b/src/db/gpx.ts
@@ -3,6 +3,7 @@ import { cloneDeep, isEmpty } from 'lodash';
 import { PureComponent } from 'react';
 import { $DEVCOMP } from 'solid-js';
 import { Point, Rectangle } from '../components/map/types';
+import { state } from '../db-admin/health-legacy';
 import { lat2tile, lon2tile, rectanglesIntersect } from '../lib/geo';
 import { findStartTime } from '../lib/gpx';
 import getUri, { intToGpxId, intToTrkptId } from '../lib/ids';
@@ -78,7 +79,8 @@ const prune = (
     trkpt: number;
   },
   extensions: any,
-  docs: any[]
+  docs: any[],
+  shared: string[]
 ) => {
   if (typeof object === 'object') {
     for (const key in object) {
@@ -124,94 +126,18 @@ const prune = (
           docs.push({
             _id: getUri(key, subId),
             type: key,
+            shared,
+            origin: state().remoteUrl,
             doc: subObjects[index],
           });
-          prune(subId, subObjects[index], previousIds, {}, docs);
+          prune(subId, subObjects[index], previousIds, {}, docs, shared);
         }
         object[key] = undefined;
-      } else prune(id, object[key], previousIds, extensions, docs);
+      } else prune(id, object[key], previousIds, extensions, docs, shared);
     }
   }
 };
 
-// const extensionsFromObject = (
-//   object: any,
-//   extensions = {
-//     viewport: { topLeft: <Point>{}, bottomRight: <Point>{} },
-//     bbox: {
-//       minLon: <number | undefined>undefined,
-//       minLat: <number | undefined>undefined,
-//       maxLon: <number | undefined>undefined,
-//       maxLat: <number | undefined>undefined,
-//     },
-//   }
-// ) => {
-//   if (typeof object === 'object') {
-//     if ('$' in object) {
-//       const attributes = object.$;
-//       if ('lat' in attributes) {
-//         const lat = +attributes.lat;
-//         if (
-//           extensions.bbox.minLat === undefined ||
-//           lat < extensions.bbox.minLat
-//         ) {
-//           extensions.bbox.minLat = lat;
-//         }
-//         if (
-//           extensions.bbox.maxLat === undefined ||
-//           lat > extensions.bbox.maxLat
-//         ) {
-//           extensions.bbox.maxLat = lat;
-//         }
-//       }
-//       if ('lon' in attributes) {
-//         const lon = +attributes.lon;
-//         if (
-//           extensions.bbox.minLon === undefined ||
-//           lon < extensions.bbox.minLon
-//         ) {
-//           extensions.bbox.minLon = lon;
-//         }
-//         if (
-//           extensions.bbox.maxLon === undefined ||
-//           lon > extensions.bbox.maxLon
-//         ) {
-//           extensions.bbox.maxLon = lon;
-//         }
-//       }
-//     }
-//     for (const key in object) {
-//       extensionsFromObject(object[key], extensions);
-//     }
-//   }
-//   return extensions;
-// };
-
-// const extensionsFromGpx = (gpx: Gpx) => {
-//   const extensions = { ...gpx.extensions, ...extensionsFromObject(gpx) };
-//   gpx.extensions = undefined;
-//   if (
-//     extensions.bbox.maxLat !== undefined &&
-//     extensions.bbox.minLon !== undefined
-//   ) {
-//     extensions.viewport.topLeft = {
-//       x: lon2tile(extensions.bbox.minLon, 0),
-//       y: lat2tile(extensions.bbox.maxLat, 0),
-//     };
-//   }
-//   if (
-//     extensions.bbox.minLat !== undefined &&
-//     extensions.bbox.maxLon !== undefined
-//   ) {
-//     extensions.viewport.bottomRight = {
-//       x: lon2tile(extensions.bbox.maxLon, 0),
-//       y: lat2tile(extensions.bbox.minLat, 0),
-//     };
-//   }
-
-//   return extensions;
-// };
-
 const hasMissingTimestamps = (trk: Trk) => {
   for (const trkseg of trk.trkseg!) {
     for (const trkpt of trkseg.trkpt!) {
@@ -261,6 +187,7 @@ export const pruneAndSaveImportedGpx = async (params: any) => {
   };
   convertTrkToRteWhenNeeded(gpx);
   let previousGpx: Gpx | null = null;
+  let shared: string[];
   if (id === 'new') {
     const currentDateTime = new Date().toISOString();
     const startTime = new Date(findStartTime(gpx, currentDateTime));
@@ -272,16 +199,26 @@ export const pruneAndSaveImportedGpx = async (params: any) => {
     }
     gpxId = { gpx: intToGpxId(startTime.valueOf()) };
     docs = [
-      { _id: getUri('gpx', gpxId), type: 'gpx', doc: gpx },
+      {
+        _id: getUri('gpx', gpxId),
+        type: 'gpx',
+        origin: state().remoteUrl,
+        doc: gpx,
+        // a new GPX isn't shared...
+      },
       {
         _id: getUri('extensions', gpxId),
         type: 'extensions',
+        origin: state().remoteUrl,
         doc: {},
       },
     ];
   } else {
     gpxId = getUri('gpx', id);
     previousGpx = (await getGpx({ id })) ?? null;
+    if (previousGpx?.extensions?.shared) {
+      shared = previousGpx?.extensions?.shared.split(/\s*,\s*/);
+    }
     console.log({
       caller: 'pruneAndSaveImportedGpx / previousGpx',
       id,
@@ -312,7 +249,7 @@ export const pruneAndSaveImportedGpx = async (params: any) => {
     const trkId = getUri('trk', trkUri);
     previousIds.trk = trkId.trk;
   }
-  prune(gpxId, gpx, previousIds, extensions, docs);
+  prune(gpxId, gpx, previousIds, extensions, docs, shared);
   console.log({ caller: 'pruneAndSaveImportedGpx / pruned', docs });
   try {
     const result = await putAll(docs);