# Problems with Mautic 4.2 updade

**URL:** <https://forum.mautic.org/t/problems-with-mautic-4-2-updade/22890>\
**Category:** Mautic 4 Install/Upgrade Support\
**Created:** [March 2, 2022, 3:36pm UTC](https://forum.mautic.org/t/problems-with-mautic-4-2-updade/22890 "2022-03-02T15:36:24Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![silavapi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/silavapi/32/7424_2.png) [@silavapi](https://forum.mautic.org/u/silavapi)\
**Post date:** [March 3, 2022, 2:55pm UTC](https://forum.mautic.org/t/problems-with-mautic-4-2-updade/22890/2 "2022-03-03T14:55:24Z")

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This is a duplicate of an existing issue:

> [@Error after upgrading to 4.2 clearing cache fails and error: Unknown column last\_built\_date in field list](https://forum.mautic.org/t/error-after-upgrading-to-4-2-from-4-unknown-column-last-built-date-in-field-list/22866/4):
>
> Right - @tobsowo had a similar problem. Other than the usual ‘don’t update in the browser’ message, here’s what helped him: Clear the cache by deleting the cache folder Follow these steps:

Please follow those steps and reply in that thread if you continue to experience a problem.

Thanks!

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_[View the full topic](https://forum.mautic.org/t/problems-with-mautic-4-2-updade/22890)._