Can't apply database update_128

Commit# 14491 modifies the term_node table to make both tid and nid primary keys. That is,

ALTER TABLE term_node ADD PRIMARY KEY (tid,nid);

However, I've got nodes (as referenced by nid) that have multiple taxonomy terms associated with them (as reference by tid). As such, the node_term table with have duplicate entries of nid, one for each term (tid) that the node is associated with. I don't believe you can make a column a primary key if the values are not unique can you?

(Ref: http://drupal.org/node/19275)

-- timothy