diff --git a/Services/AdvancedMetaData/classes/Types/class.ilAdvancedMDFieldDefinitionSelect.php b/Services/AdvancedMetaData/classes/Types/class.ilAdvancedMDFieldDefinitionSelect.php
index ff680284fe02..d3a3c93315e3 100644
--- a/Services/AdvancedMetaData/classes/Types/class.ilAdvancedMDFieldDefinitionSelect.php
+++ b/Services/AdvancedMetaData/classes/Types/class.ilAdvancedMDFieldDefinitionSelect.php
@@ -603,7 +603,7 @@ public function update(): void
 
                     if ($sub_type == "wpg") {
                         // #15763 - adapt advmd page lists
-                        ilPCAMDPageList::migrateField($obj_id, $this->getFieldId(), $old_option, $new_option, true);
+                        ilPCAMDPageList::migrateField((int) $obj_id, $this->getFieldId(), $old_option, $new_option, true);
                     }
                 }
             }