MySQL multi-value index removes the primary key on introspection

[pimeys]

With the given DDL:

CREATE TABLE customers
(
    id       INT AUTO_INCREMENT PRIMARY KEY,
    custinfo JSON,
    INDEX zips ((CAST(custinfo -> '$.zipcode' AS UNSIGNED ARRAY)))
);

The introspection will not render the =@id= attribute to the =id= field:

/// The underlying table does not contain a valid unique identifier and can therefore currently not be handled by the Prisma Client.
model customers {
  id       Int       @default(autoincrement())
  custinfo Json?

  @@ignore
}

If we do not have the index defined, we correctly render the id as id Int @id @default(autoincrement()).