# Cannot access after upgrade from mysql to mariadb

**URL:** <https://forum.mautic.org/t/cannot-access-after-upgrade-from-mysql-to-mariadb/32482>\
**Category:** Product Support\
**Tags:** mautic-4\
**Created:** [June 21, 2024, 4:58pm UTC](https://forum.mautic.org/t/cannot-access-after-upgrade-from-mysql-to-mariadb/32482 "2024-06-21T16:58:35Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![armitage318](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/armitage318/32/1441_2.png) [@armitage318](https://forum.mautic.org/u/armitage318)\
**Post date:** [June 21, 2024, 4:58pm UTC](https://forum.mautic.org/t/cannot-access-after-upgrade-from-mysql-to-mariadb/32482/1 "2024-06-21T16:58:35Z")

</div>

**Your software**  
My Mautic version is: 4.4.5  
My PHP version is: 8.0  
My Database type and version is: mariadb 10.61.8

**Your problem**  
My problem is:  
Hi, I just upgraded from mysql to MariaDB 10.6 and now I am unable to access backend.

These errors are showing in the log:

`[2024-06-21 18:36:20] mautic.CRITICAL: Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occurred while executing 'SELECT DATE_FORMAT(t.date_added, '%Y-%m-%d') AS date, COUNT(*) AS count FROM bm_leads t WHERE t.date_added BETWEEN ? AND ? GROUP BY DATE_FORMAT(t.date_added, '%Y-%m-%d') ORDER BY DATE_FORMAT(t.date_added, '%Y-%m-%d') ASC LIMIT 32' with params ["2024-05-21 00:00:00", "2024-06-21 23:59:59"]: SQLSTATE[42S02]: Base table or view not found: 1932 Table 'database.bm_leads' doesn't exist in engine"`

`database.bm_emails Error : Unknown data type: 'MYSQL_JSON' error : Corrupt`

Steps I have tried to fix the problem:

none yet

What can I do to solve the issue? I have full dumps of database (while it was MySQL).  
Thank you