UPDATE rad SET `IDType` = '1', `XB` = '1096513935', `Name` = 'R2', `Identifier` = '3', `IDGPS` = '3', `IDSect` = '5', `Initial` = '0', `IDModif` = '99', `DateModif` = NOW() WHERE  IDRad = '3'

ERROR 1242 (21000): Subquery returns more than 1 row

select * from rad where IDRad = 3;

+-------+--------+--------+-------+------+------------+------------+---------+-------------+---------------------+
| IDRad | IDSect | IDType | IDGPS | Name | Identifier | XB         | Initial | IDUserModif | DateModif           |
+-------+--------+--------+-------+------+------------+------------+---------+-------------+---------------------+
|     3 |      1 |      1 |     3 | R2   | 3          | 1096513935 |       0 |          99 | 2018-01-19 01:14:01 |
+-------+--------+--------+-------+------+------------+------------+---------+-------------+---------------------+