doing correct comparison to find page to delete

src/plugins/notebook/components/PageCollection.vue

@@ -69,7 +69,7 @@ export default {
     methods: {
         deletePage(id) {
             const selectedSection = this.sections.find(s => s.isSelected);
-            const page = this.pages.find(p => p.id !== id);
+            const page = this.pages.find(p => p.id === id);
             deleteNotebookEntries(this.openmct, this.domainObject, selectedSection, page);
 
             const selectedPage = this.pages.find(p => p.isSelected);