EXCEPT statements produce Coq syntax error

[Snoozy]

schema s1(id:ty0, ??);

table Products(s1);
table Inventory(s1);

query q1
`
SELECT id as p_id
FROM Products
EXCEPT
SELECT id as i_id
FROM Inventory
`;

verify q1 q1;

The above query will cause a syntax error on the id in the second SELECT line.