FW: getting error while running sql on mm_activealrm table

Hi all,

We are getting following error message on doing any action on the table like(Select or open from pgadmin).

Please suggest.

ERROR: missing chunk number 0 for toast value 54787 in pg_toast_2619
********** Error **********

ERROR: missing chunk number 0 for toast value 54787 in pg_toast_2619
SQL state: XX000

CREATE TABLE mm_activealarm
(
alarm_id integer NOT NULL,
source_address character varying(255) NOT NULL,
alarm_instance_id integer NOT NULL,
alarm_raise_time bigint,
alarm_update_time bigint,
alarm_cease_time bigint,
alarm_count integer,
alarm_severity integer NOT NULL,
source_type character varying(40) NOT NULL,
alarm_state integer NOT NULL,
event_type integer,
notification_id integer NOT NULL,
probable_cause integer NOT NULL,
specific_problem integer NOT NULL,
alarm_additional_text character varying(10240),
alarm_ack_time bigint,
alarm_ack_user character varying(100) NOT NULL,
alarm_ack_system character varying(100) NOT NULL,
alarm_proposed_repair_action character varying(10240) NOT NULL,
CONSTRAINT mm_activealarm_pk PRIMARY KEY (alarm_id, source_address)
USING INDEX TABLESPACE mgrdata
)
WITH (
OIDS=FALSE
)
TABLESPACE mgrdata;
ALTER TABLE ss_activealarm
OWNER TO ss_super;

Regards
Tarkeshwar