SQL Error - Admin Console

Dear All

I'm getting the below error while executing the script in admin console. could you please help me on this.

Thanks in Advance

SELECT CreateSequenceIfNecessary('NeoCustomId', '1000', 'cache 1000');

create or replace function GetNeoCustomId() returns integer as '
declare
iId integer;
begin
select into iId NextVal(''NeoCustomId'');
return iId;
end;
' language plpgsql
;
create or replace function GetNewNeoCustomIds(integer) returns text as '
declare
strIds text;
i integer;
iId integer;
begin
strIds = '''';
for i in 1 .. $1 loop
select NextVal(''NeoCustomId'') into iId ;
if i > 1 then
strIds := strIds || '','';
end if;
strIds := strIds || cast(iId as text);
end loop;
return strIds;
end;
' language plpgsql
;