fix(dropdownfield): ambiguous column in SQL query

Author: btry

inc/field/dropdownfield.class.php

@@ -245,7 +245,7 @@ public function buildParams($rand = null) {
                   ],
                ]);
                $tickets_filter[] = [
-                  'id' => $requestersObserversQuery,
+                  Ticket::getTableField('id') => $requestersObserversQuery,
                ];
             }