[postgis-users] problem with st_makevalid and (LineString)

[islanis at infomed.sld.cu]

Hello people, i got a problem where i have no idea what can i do.

I have this table

CREATE TABLE ft_potencial
(
   id_dw_ft_potencial integer NOT NULL,
   id_dw_tipo integer NOT NULL,
   id_dw_mes integer NOT NULL,
   id_dw_municipio integer NOT NULL,
   id_dw_date integer NOT NULL,
   potencial real NOT NULL,
   area real NOT NULL,
   the_geom geometry(Polygon,4326),
   CONSTRAINT ft_potencial_pkey PRIMARY KEY (id_dw_ft_potencial,  
id_dw_tipo, id_dw_mes, id_dw_municipio, id_dw_date)
)
WITH (
   OIDS=FALSE
);

and i want to clean  the errors that it has using the function ST_MakeValid
in this way

update ft_potencial set the_geom=ST_MakeValid(the_geom);

but it always return this error

ERROR:  Geometry type (LineString) does not match column type (Polygon)

********** Error **********

ERROR: Geometry type (LineString) does not match column type (Polygon)
Estado SQL:22023


what can i do to fix or clean the geometry without problems.

please help.
thanks

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