Error in restriction of projection of restriction about datajoint-matlab HOT 2 OPEN

import datajoint as dj

schema = dj.schema('datajoint_bug', locals())

@schema
class Subject(dj.Lookup):
    definition = """
    id                  : int # subject id
    ---
    name                : varchar(40) # real name
    """

    contents = [(0,'Edgar'), (1, 'Dimitri'), (2, 'Fabian')]

rel =  ((Subject() & 'id=0').project() & 'id=0')
print(rel.make_select())