ERROR CODE

I am creating a new table called patienttype with categories -
infant,pediatric, adult in the doctors table

for some reason it allows me to create a sequence but, when I create a
table that requires that sequence, I get the following.

create table patienttype (
id INT DEFAULT nextval ('category_seq'),
parent id INT DEFAULT '0',
type varchar(50));

Here is the error? What is that all about?
ERROR:  Unable to locate type name 'id' in catalog

Thanks,

Ray

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