# Upgrade Guide ## v2 to v3 In v3, the `cbq_failed_jobs` table migrates the `failedDate` column type from a timestamp to a unix timestamp. A migration file is included in `resources/database/migrations/2000_01_01_000006_use_unix_timestamp_for_failed_job_log_failedDate.cfc`. To run this migration, your failed jobs table will need to be empty. Alternatively, you can write your own migration that converts the timestamp to a unix timestamp. (The logic is different for each database grammar.) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cbq.ortusbooks.com/3.0.0/upgrade-guide.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.