Ensure that ordered item list keys are unique

submodules/TelegramCore/Sources/State/ManagedRecentStickers.swift

@@ -27,8 +27,20 @@ private func managedRecentMedia(postbox: Postbox, network: Network, collectionId
             itemIds.reverse()
         }
         return fetch(forceFetch ? 0 : hashForIds(itemIds))
-            |> mapToSignal { items in
-                if let items = items {
+            |> mapToSignal { sourceItems in
+                var items: [OrderedItemListEntry] = []
+                if let sourceItems = sourceItems {
+                    var existingIds = Set<MediaId>()
+                    for item in sourceItems {
+                        guard let id = (item.contents as? RecentMediaItem)?.media.id else {
+                            continue
+                        }
+                        if !existingIds.contains(id) {
+                            existingIds.insert(id)
+                            items.append(item)
+                        }
+                    }
+
                     return postbox.transaction { transaction -> Void in
                         transaction.replaceOrderedItemListItems(collectionId: collectionId, items: items)
                     }