field broken? (Freeform)

I am having a problem with a field that was created for Freeform. I have several forms that write data to a field named ‘release’. While the html pages correctly display the data, all my csv templates stopped working until I deleted that field from the queries.

Also, I found that if I went to Modules › Freeform › Manage Fields › Edit Field for ‘release’ and hit the update button, it would throw an error:

Error Number: 1064

Description: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘release release varchar(10) NOT NULL’ at line 1

Query: ALTER TABLE exp_freeform_entries CHANGE release release varchar(10) NOT NULL

Using v 1.6.4 (Yes, I know.)

Mod Edit: Moved to the Modules: Discussion and Questions forum.