web2py list reference

I am trying to get the list:reference field type to work for web2py, but for some reason I am getting an error. I am trying the example on http://web2py.com/book/default/chapter/06:

db.define_table('tag',Field('name'),format='%(name)s')
db.define_table('product',
    Field('name'),
    Field('tags','list:reference tag'))

When I try this, I get the following error:

Traceback (most recent call last):
File "gluon/restricted.py", line 178, in res开发者_开发知识库tricted
File "C:/web2py/applications/idd/models/db.py", line 93, in <module>
File "gluon/sql.py", line 1309, in define_table
File "gluon/sql.py", line 1664, in _create
SyntaxError: Field: unknown field type: list:reference tag for tags

This should be really simple, but is not working. Am I missing something that the book doesn't tell us about?

You have an old web2py version. This feature was released in 1.83.2 the same time as the 3rd ed of the book.