diff --git a/webapp/src/Service/ImportExportService.php b/webapp/src/Service/ImportExportService.php
index 4391478194..889b0fc3b9 100644
--- a/webapp/src/Service/ImportExportService.php
+++ b/webapp/src/Service/ImportExportService.php
@@ -618,7 +618,7 @@ public function importGroupsJson(array $data, ?string &$message = null, ?array &
                 'visible' => !($group['hidden'] ?? false),
                 'sortorder' => @$group['sortorder'],
                 'color' => @$group['color'],
-                'allow_self_registration' => @$group['allow_self_registration'],
+                'allow_self_registration' => $group['allow_self_registration'] ?? false,
             ];
         }