What reason can I choose when filing an I-90 application if the information on the card is incorrect due to a mistake I made?

When your biographic information has legally changed.

The USCIS filing instructions state that if the mistake on the card was not due to a USCIS error, applicant may select the reason "My name or other biographic information has legally changed since the issuance of my existing card." CITATION: Page 6, Pt.3C; http://www.uscis.gov/sites/default/files/files/form/i-90instr.pdf