I installed XDebug and Aptana Studio. When I debug my yii application I get this error: General error: 1 table YiiCache already exists. The SQL statement executed was: CREATE TABLE YiiCache If I delete protected/runtime/cache.db, the error seems to vanish, but it appears another one: CHttpRequest is unable to determine the request URI. The next time I debug the yii application it appears the first error. What should I do to solve these errors?