A Database Error Occurred

Error Number: 1525

Incorrect DATETIME value: 'DATE_SUB(NOW(),INTERVAL 1 YEAR)'

SELECT COUNT(*) AS `numrows` FROM `listings` WHERE `date_added` >= 'DATE_SUB(NOW(),INTERVAL 1 YEAR)' AND `user_id` = '554' AND `status` = 'sold'

Filename: models/Listing_model.php

Line Number: 528