diff --git a/static-site/src/components/ListResources/useDataFetch.ts b/static-site/src/components/ListResources/useDataFetch.ts
index c18db4399..1f064fa5c 100644
--- a/static-site/src/components/ListResources/useDataFetch.ts
+++ b/static-site/src/components/ListResources/useDataFetch.ts
@@ -63,18 +63,12 @@ function partitionByPathogen(
   versioned: boolean,
 ) {
   return Object.entries(pathVersions).reduce((store: Record<string, Resource[]>, [name, dates]) => {
-    const sortedDates = [...dates].sort();
-
     const nameParts = name.split('/');
 
     if (nameParts[0] === undefined) {
       throw new InternalError(`Name is not properly formatted: '${name}'`);
     }
 
-    if (sortedDates[0] === undefined) {
-      throw new InternalError("Resource does not have any dates.");
-    }
-
     const groupName = nameParts[0];
 
     const resourceDetails: Resource = {
@@ -83,9 +77,14 @@ function partitionByPathogen(
       nameParts,
       sortingName: _sortableName(nameParts),
       url: `/${pathPrefix}${name}`,
-      lastUpdated: sortedDates.at(-1),
     };
     if (versioned) {
+      const sortedDates = [...dates].sort();
+      if (sortedDates[0] === undefined) {
+        throw new InternalError("Resource does not have any dates.");
+      }
+
+      resourceDetails.lastUpdated = sortedDates.at(-1);
       resourceDetails.firstUpdated = sortedDates[0];
       resourceDetails.dates = sortedDates;
       resourceDetails.nVersions = sortedDates.length;