hi I'm trying to migrate down but I get the following error Exception: SQLSTATE[42S02]: Base table or view not found: 1051 Unknown table 'projectos.fk_bitt_proy'

$this->addForeignKey('FK_bitt_proy', 'Bitacoratiempos', 'idProyecto', 'Proyectos', 'idProyecto');

public function safeDown(){
   $this->dropTable('FK_bitt_proy','Bitacoratiempos');
}

which I do not understand because it refers to the projectos table if the key is in bitacoratiempos