diff --git a/apps/roam/src/utils/syncDgNodesToSupabase.ts b/apps/roam/src/utils/syncDgNodesToSupabase.ts
index c2e116073..2ce3b5bbb 100644
--- a/apps/roam/src/utils/syncDgNodesToSupabase.ts
+++ b/apps/roam/src/utils/syncDgNodesToSupabase.ts
@@ -67,11 +67,17 @@ const notifyEndSyncFailure = ({
   });
 };
 
-export const endSyncTask = async (
-  worker: string,
-  status: Enums<"task_status">,
-  showToast: boolean = false,
-): Promise<void> => {
+export const endSyncTask = async ({
+  worker,
+  status,
+  showToast = false,
+  startTime,
+}: {
+  worker: string;
+  status: Enums<"task_status">;
+  showToast: boolean;
+  startTime: Date;
+}): Promise<void> => {
   try {
     const supabaseClient = await getLoggedInClient();
     if (!supabaseClient) return;
@@ -85,6 +91,7 @@ export const endSyncTask = async (
       s_function: SYNC_FUNCTION,
       s_worker: worker,
       s_status: status,
+      s_started_at: startTime.toISOString(),
     });
     if (error) {
       console.error("endSyncTask: Error calling end_sync_task:", error);
@@ -392,7 +399,7 @@ export const setSyncActivity = (active: boolean) => {
 export const createOrUpdateDiscourseEmbedding = async (showToast = false) => {
   if (!doSync) return;
   console.debug("starting createOrUpdateDiscourseEmbedding");
-  const startTime = new Date().valueOf();
+  const startTime = new Date();
   let success = true;
   let claimed = false;
   const worker = window.roamAlphaAPI.user.uid();
@@ -455,14 +462,15 @@ export const createOrUpdateDiscourseEmbedding = async (showToast = false) => {
       context,
     });
     await cleanupOrphanedNodes(supabaseClient, context);
-    await endSyncTask(worker, "complete", showToast);
-    const duration = (new Date().valueOf() - startTime) / 1000.0;
+    await endSyncTask({ worker, status: "complete", showToast, startTime });
+    const duration = (new Date().valueOf() - startTime.valueOf()) / 1000.0;
     posthog.capture("Sync complete", { duration });
   } catch (error) {
     console.error("createOrUpdateDiscourseEmbedding: Process failed:", error);
     success = false;
-    if (worker && claimed) await endSyncTask(worker, "failed", showToast);
-    const duration = (new Date().valueOf() - startTime) / 1000.0;
+    if (worker && claimed)
+      await endSyncTask({ worker, status: "failed", showToast, startTime });
+    const duration = (new Date().valueOf() - startTime.valueOf()) / 1000.0;
     posthog.capture("Sync error", { duration });
     if (error instanceof FatalError) {
       doSync = false;
diff --git a/packages/database/src/dbTypes.ts b/packages/database/src/dbTypes.ts
index 1f3529b30..b968544ba 100644
--- a/packages/database/src/dbTypes.ts
+++ b/packages/database/src/dbTypes.ts
@@ -1469,6 +1469,7 @@ export type Database = {
       end_sync_task: {
         Args: {
           s_function: string
+          s_started_at?: string
           s_status: Database["public"]["Enums"]["task_status"]
           s_target: number
           s_worker: string
diff --git a/packages/database/supabase/migrations/20260321191952_end_sync_task_w_start_time.sql b/packages/database/supabase/migrations/20260321191952_end_sync_task_w_start_time.sql
new file mode 100644
index 000000000..12d353969
--- /dev/null
+++ b/packages/database/supabase/migrations/20260321191952_end_sync_task_w_start_time.sql
@@ -0,0 +1,83 @@
+DROP FUNCTION IF EXISTS public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status);
+
+CREATE OR REPLACE FUNCTION public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status,
+    s_started_at timestamptz = NULL
+) RETURNS void
+SET search_path = ''
+LANGUAGE plpgsql
+AS $$
+DECLARE t_id INTEGER;
+DECLARE t_worker varchar;
+DECLARE t_status public.task_status;
+DECLARE t_failure_count SMALLINT;
+DECLARE t_last_task_start TIMESTAMP WITH TIME ZONE;
+DECLARE t_last_success_start TIMESTAMP WITH TIME ZONE;
+DECLARE t_last_task_end TIMESTAMP WITH TIME ZONE;
+BEGIN
+    SELECT id, worker, status, failure_count, last_task_start, last_task_end, last_success_start
+        INTO STRICT t_id, t_worker, t_status, t_failure_count, t_last_task_start, t_last_task_end, t_last_success_start
+        FROM public.sync_info WHERE sync_target = s_target AND sync_function = s_function;
+    ASSERT s_status > 'active';
+    IF t_worker != s_worker AND COALESCE(s_started_at, t_last_task_start) < t_last_task_start THEN
+        -- we probably took too long. Let the other task have priority.
+        RETURN;
+    END IF;
+    ASSERT t_worker = s_worker, 'Wrong worker';
+    ASSERT s_status >= t_status, 'do not go back in status';
+    IF s_status = 'complete' THEN
+        t_last_task_end := now();
+        t_last_success_start := t_last_task_start;
+        t_failure_count := 0;
+    ELSE
+        IF t_status != s_status THEN
+            t_failure_count := t_failure_count + 1;
+        END IF;
+    END IF;
+
+    UPDATE public.sync_info
+        SET status = s_status,
+            task_times_out_at=null,
+            last_task_end=t_last_task_end,
+            last_success_start=t_last_success_start,
+            failure_count=t_failure_count
+        WHERE id=t_id;
+END;
+$$;
+
+ALTER FUNCTION public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status,
+    s_started_at timestamptz
+) OWNER TO "postgres";
+
+GRANT ALL ON FUNCTION public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status,
+    s_started_at timestamptz
+) TO "anon";
+GRANT ALL ON FUNCTION public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status,
+    s_started_at timestamptz
+) TO "authenticated";
+GRANT ALL ON FUNCTION public.end_sync_task(
+    s_target bigint,
+    s_function character varying,
+    s_worker character varying,
+    s_status public.task_status,
+    s_started_at timestamptz
+) TO "service_role";
diff --git a/packages/database/supabase/schemas/sync.sql b/packages/database/supabase/schemas/sync.sql
index 6ae25b7f3..10e73a91d 100644
--- a/packages/database/supabase/schemas/sync.sql
+++ b/packages/database/supabase/schemas/sync.sql
@@ -50,7 +50,8 @@ CREATE OR REPLACE FUNCTION public.end_sync_task(
     s_target bigint,
     s_function character varying,
     s_worker character varying,
-    s_status public.task_status
+    s_status public.task_status,
+    s_started_at timestamptz = NULL
 ) RETURNS void
 SET search_path = ''
 LANGUAGE plpgsql
@@ -67,6 +68,10 @@ BEGIN
         INTO STRICT t_id, t_worker, t_status, t_failure_count, t_last_task_start, t_last_task_end, t_last_success_start
         FROM public.sync_info WHERE sync_target = s_target AND sync_function = s_function;
     ASSERT s_status > 'active';
+    IF t_worker != s_worker AND COALESCE(s_started_at, t_last_task_start) < t_last_task_start THEN
+        -- we probably took too long. Let the other task have priority.
+        RETURN;
+    END IF;
     ASSERT t_worker = s_worker, 'Wrong worker';
     ASSERT s_status >= t_status, 'do not go back in status';
     IF s_status = 'complete' THEN
@@ -93,7 +98,8 @@ ALTER FUNCTION public.end_sync_task(
     s_target bigint,
     s_function character varying,
     s_worker character varying,
-    s_status public.task_status
+    s_status public.task_status,
+    s_started_at timestamptz
 ) OWNER TO "postgres";
 
 
@@ -190,19 +196,22 @@ GRANT ALL ON FUNCTION public.end_sync_task(
     s_target bigint,
     s_function character varying,
     s_worker character varying,
-    s_status public.task_status
+    s_status public.task_status,
+    s_started_at timestamptz
 ) TO "anon";
 GRANT ALL ON FUNCTION public.end_sync_task(
     s_target bigint,
     s_function character varying,
     s_worker character varying,
-    s_status public.task_status
+    s_status public.task_status,
+    s_started_at timestamptz
 ) TO "authenticated";
 GRANT ALL ON FUNCTION public.end_sync_task(
     s_target bigint,
     s_function character varying,
     s_worker character varying,
-    s_status public.task_status
+    s_status public.task_status,
+    s_started_at timestamptz
 ) TO "service_role";
 
 GRANT ALL ON FUNCTION public.propose_sync_task(