diff --git a/admin/tool/dataprivacy/classes/form/purpose.php b/admin/tool/dataprivacy/classes/form/purpose.php
index e81577f459d..dba39dfd339 100644
--- a/admin/tool/dataprivacy/classes/form/purpose.php
+++ b/admin/tool/dataprivacy/classes/form/purpose.php
@@ -114,7 +114,7 @@ class purpose extends persistent {
         if (is_array($data->lawfulbases)) {
             $data->lawfulbases = implode(',', $data->lawfulbases);
         }
-        if (is_array($data->sensitivedatareasons)) {
+        if (!empty($data->sensitivedatareasons) && is_array($data->sensitivedatareasons)) {
             $data->sensitivedatareasons = implode(',', $data->sensitivedatareasons);
         }