# Percona XtraDB Cluster upgrade 5.6 to 5.7 mysql\_upgrade \[ERROR\] 1243

**URL:** <https://forums.percona.com/t/percona-xtradb-cluster-upgrade-5-6-to-5-7-mysql-upgrade-error-1243/5182>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [October 31, 2016, 8:07am UTC](https://forums.percona.com/t/percona-xtradb-cluster-upgrade-5-6-to-5-7-mysql-upgrade-error-1243/5182 "2016-10-31T08:07:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Silver](https://avatars.discourse-cdn.com/v4/letter/s/a3d4f5/32.png) [@Silver](https://forums.percona.com/u/Silver)\
**Post date:** [October 31, 2016, 8:07am UTC](https://forums.percona.com/t/percona-xtradb-cluster-upgrade-5-6-to-5-7-mysql-upgrade-error-1243/5182/1 "2016-10-31T08:07:22Z")

</div>

Hello, I try upgrade Percona Cluster from 56-5.6.30-25.16.3 to 57-5.7.14-26.17.1 like in this guide [URL=“[https://www.percona.com/doc/percona-xtradb-cluster/5.7/install/upgrade\_guide.html](https://www.percona.com/doc/percona-xtradb-cluster/5.7/install/upgrade_guide.html)”][https://www.percona.com/doc/percona-...ade\_guide.html[/URL]](https://www.percona.com/doc/percona-...ade_guide.html%5B/URL%5D). I stock on step 7. When i try mysql\_uprade got error

```auto
# mysql_upgrade
Checking if update is needed.
Checking server version.
Running queries to upgrade MySQL server.
mysql_upgrade: [ERROR] 1243: Unknown prepared statement handler (stmt) given to EXECUTE

```

```auto
# mysql_upgrade --version
mysql_upgrade Ver 2.0 Distrib 5.7.14-8, for Linux (x86_64)

```

It’s only one database on this server. I try this two time on other test servers and result was same. Default config after install on Centos 7 (My normal config don’t work too).

Its something wron with my database, or server?