IncreaseIdentifierLength migration only works in up mode

db/migrations/20201109223011_increase_identifier_length.php

@@ -4,7 +4,7 @@ use Phinx\Migration\AbstractMigration;
 
 class IncreaseIdentifierLength extends AbstractMigration
 {
-    public function change()
+    public function up()
     {
         $this->adapter->execute("ALTER TABLE dons modify COLUMN identifier VARCHAR(255) NULL;");
     }