that one of your plugins has an update to the db table for that plugin. Some plugins have their own db table and that plugin is trying to update itself in its own db table. Check with the plugin dev to see if there is a query that needs to be run to update that plugin. Normally the query is in the update folder. But dont run any query unless you check with them first, you will make the matter worse.
OR
it means that the oxwall update process is trying to update the oxwall plugin db to set the plugins version to the new version. It should have done so when you updated the plugin or whatever it was you updated.
Hope that helps
They should already be set that way and you should never change them unless a team member says so.