UPDATE OID

Hello I have a problem with an update

CREATE COLUMN TABLE UTENTE_FILTRO_REPORTING (

COD_UTENTE                   VARCHAR(30) NOT NULL,

DIMENSIONE_REPORTING    VARCHAR(10) NOT NULL,

COD_GERARCHIA               VARCHAR(5) NOT NULL DEFAULT '[!]',

VALORE                             VARCHAR(255) NULL

);

ALTER TABLE UTENTE_FILTRO_REPORTING ADD (OID_UTENTE_FILTRO_REPORTING VARCHAR(36) NULL);

UPDATE UTENTE_FILTRO_REPORTING

SET OID_UTENTE_FILTRO_REPORTING = SYSUUID

WHERE OID_UTENTE_FILTRO_REPORTING IS NULL;

I have this error

[314]: numeric overflow:

Can you help me? I want update de new column with the ID

tenks Paola

P:S:

if I insert a row in this table, with this script

INSERT INTO UTENTE_FILTRO_REPORTING (OID_UTENTE_FILTRO_REPORTING,

COD_UTENTE, DIMENSIONE_REPORTING,

COD_GERARCHIA, VALORE )

VALUES ( SYSUUID , 'LINDA', 'PP', 'PPPP', 'PPP');

I have not the error