normalized active sort on collection schema change

ui/src/components/records/PageRecords.svelte

@@ -46,6 +46,10 @@
         reset();
     }
 
+    $: if ($activeCollection?.id) {
+        normalizeSort();
+    }
+
     // keep the url params in sync
     $: if (sort || filter || $activeCollection?.id) {
         const query = new URLSearchParams({
@@ -63,12 +67,31 @@
         filter = "";
         sort = "-created";
 
-        // clear default sort if created field is not available
-        if (
-            $activeCollection?.$isView &&
-            !CommonHelper.extractColumnsFromQuery($activeCollection.options.query).includes("created")
-        ) {
-            sort = "";
+        normalizeSort();
+    }
+
+    // ensures that the sort fields exist in the collection
+    async function normalizeSort() {
+        if (!sort) {
+            return; // nothing to normalize
+        }
+
+        const collectionFields = CommonHelper.getAllCollectionIdentifiers($activeCollection);
+
+        const sortFields = sort.split(",").map((f) => {
+            if (f.startsWith("+") || f.startsWith("-")) {
+                return f.substring(1);
+            }
+            return f;
+        });
+
+        // invalid sort expression or missing sort field
+        if (sortFields.filter((f) => collectionFields.includes(f)).length != sortFields.length) {
+            if (collectionFields.includes("created")) {
+                sort = "-created";
+            } else {
+                sort = "";
+            }
         }
     }