diff --git a/src/bot/commands/check-app.js b/src/bot/commands/check-app.js
index 8a7080a..24d20cb 100644
--- a/src/bot/commands/check-app.js
+++ b/src/bot/commands/check-app.js
@@ -60,6 +60,10 @@ async function googleRowsFor(apps, scraper, nowMs, threshold, timezone) {
         continue;
       }
       const updatedMs = Number(resp.updated);
+      if (!Number.isFinite(updatedMs)) {
+        rows.push([a.appId, '?', '?', mark(false)]);
+        continue;
+      }
       const days = daysBetween(updatedMs, nowMs);
       rows.push([a.appId, formatDateInTz(new Date(updatedMs), timezone), String(days), mark(days <= threshold)]);
     } catch {
diff --git a/src/bot/commands/delete-group.js b/src/bot/commands/delete-group.js
index 1f41635..181b236 100644
--- a/src/bot/commands/delete-group.js
+++ b/src/bot/commands/delete-group.js
@@ -1,6 +1,7 @@
 import { requireAdminUser } from './command-utils.js';
 
-// /delgroup [groupId] — admin-only.
+// /delgroup [groupId] — admin-only. Removes from allowlist AND wipes the
+// group's tracked-app state to avoid orphaned `group:{chatId}` keys.
 export function createDeleteGroupCommand(config, store) {
   return async (msg, sender, args) => {
     if (!(await requireAdminUser(msg.from.id, msg.chat.id, config, sender))) return;
@@ -22,6 +23,7 @@ export function createDeleteGroupCommand(config, store) {
       await sender.sendMessage(msg.chat.id, 'Group is not added');
       return;
     }
+    await store.group.deleteGroup(groupId);
     await sender.sendMessage(msg.chat.id, 'Group deleted successfully');
   };
 }
diff --git a/src/scheduler/scheduler.js b/src/scheduler/scheduler.js
index f1ec14b..c66ca67 100644
--- a/src/scheduler/scheduler.js
+++ b/src/scheduler/scheduler.js
@@ -68,6 +68,7 @@ async function checkGroup(groupId, silent, now, config, store, sender, appleScra
       const app = await googleScraper.getApp(info.appId, info.country);
       if (!app) continue;
       const updatedMs = Number(app.updated);
+      if (!Number.isFinite(updatedMs)) continue;
       const days = daysBetween(updatedMs, now.getTime());
       if (days > threshold) {
         stale.push({