diff --git a/lizmap/modules/lizmap/lib/Project/ProjectMainData.php b/lizmap/modules/lizmap/lib/Project/ProjectMainData.php
index edec65a9cd..74f4283f5e 100644
--- a/lizmap/modules/lizmap/lib/Project/ProjectMainData.php
+++ b/lizmap/modules/lizmap/lib/Project/ProjectMainData.php
@@ -547,13 +547,13 @@ protected function readCachedData($cachedData, $requiredTargetLwcVersion, $appCo
         );
 
         $qgisCachedData = $cachedData['qgis']['data'];
-        if (array_key_exists('title', $qgisCachedData)) {
+        if (array_key_exists('title', $qgisCachedData) && !is_null($qgisCachedData['title'])) {
             $data['title'] = $qgisCachedData['title'];
         }
-        if (array_key_exists('abstract', $qgisCachedData)) {
+        if (array_key_exists('abstract', $qgisCachedData) && !is_null($qgisCachedData['abstract'])) {
             $data['abstract'] = $qgisCachedData['abstract'];
         }
-        if (array_key_exists('keywordList', $qgisCachedData)) {
+        if (array_key_exists('keywordList', $qgisCachedData) && !is_null($qgisCachedData['keywordList'])) {
             $data['keywordList'] = $qgisCachedData['keywordList'];
         }