$tables['spip_mots']['field']["id_groupe_racine"] = "bigint(21) DEFAULT 0 NOT NULL";
	$tables['spip_groupes_mots']['field']["id_groupe_racine"] = "bigint(21) DEFAULT 0 NOT NULL";
	$tables['spip_groupes_mots']['field']["id_parent"]= "bigint(21) DEFAULT 0 NOT NULL";