I'm seeing the same thing even with the silly convention of capitals:
CREATE TABLE celebs (id INTEGER, name TEXT, age INTEGER);
returns a table already exists errawr. This is because the table already exists in the schema that the exercise is using. If you try the following code it will work:
drop table celebs;
create table celebs (id integer, name text, age integer);
Basically drop the table from the schema then re-create it immediately after and it will pass you.