Below likely caused by:
```
Mar 02 12:13:09 deployment-db11 mysqld[14965]: 2023-03-02 12:13:09 27 [ERROR] Incorrect definition of table mysql.proc: expected column 'definer' at position 11 to have type varchar(, found type char(141).
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [ERROR] Incorrect definition of table mysql.event: expected column 'definer' at position 3 to have type varchar(, found type char(141).
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [ERROR] Slave SQL: Query caused different errors on master and slave. Error on master: message (format)='Cannot load from %s.%s. The table is probably corrup>
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [Warning] Slave: Cannot load from mysql.proc. The table is probably corrupted Error_code: 1728
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [Warning] Slave: Failed to open mysql.event Error_code: 1545
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'deployment-db09-b>
Mar 02 12:13:12 deployment-db11 mysqld[14965]: 2023-03-02 12:13:12 27 [Note] Slave SQL thread exiting, replication stopped in log 'deployment-db09-bin.000047' at position 873808641, master: deployment-db09.deployment-prep.eqiad1.wi>
```
----
**Steps to replicate the issue** (include links if applicable):
* Go to https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Sandbox&action=edit
* Make a change
* Click save
**What happens?**:
After (re)loading, the page content has not changed. The edit was not saved.
**What should have happened instead?**:
After (re)loading, the page content would reflect the changes. The edit would be saved.
**Software version** (skip for WMF-hosted wikis like Wikipedia):
**Other information** (browser name/version, screenshots, etc.):