Try a better fix for #28526

htdocs/core/class/commonobject.class.php

@@ -570,6 +570,19 @@ abstract class CommonObject
 	public $user_modification_id;
 
 
+	/**
+	 * @var int ID
+	 * @deprecated	Use $user_creation_id
+	 */
+	public $fk_user_creat;
+
+	/**
+	 * @var int ID
+	 * @deprecated 	Use $user_modification_id
+	 */
+	public $fk_user_modif;
+
+
 	public $next_prev_filter;
 
 	/**
@@ -9048,6 +9061,11 @@ public function createCommon(User $user, $notrigger = false)
 		}
 		if (array_key_exists('fk_user_creat', $fieldvalues) && !($fieldvalues['fk_user_creat'] > 0)) {
 			$fieldvalues['fk_user_creat'] = $user->id;
+			$this->fk_user_creat = $user->id;
+		}
+		if (array_key_exists('user_modification_id', $fieldvalues) && !($fieldvalues['user_modification_id'] > 0)) {
+			$fieldvalues['user_modification_id'] = $user->id;
+			$this->user_modification_id = $user->id;
 		}
 		unset($fieldvalues['rowid']); // The field 'rowid' is reserved field name for autoincrement field so we don't need it into insert.
 		if (array_key_exists('ref', $fieldvalues)) {