When you update your source, you should read through the changelog.txt file for information on what was changed as well as the occasional special instructions for things you may need to change manually after updating (there were a few recently).
https://github.com/EQEmu/Server/blob.../changelog.txt
In the Changelog, Akkadius provides this link to explain the new logging system in-depth:
http://wiki.eqemulator.org/p?Logging...rhaul&frm=Main
In the case of this particular error, that is one of the few types enabled by default to be sent to GMs in game. It is an important error, which means either your database has a table that is not current (such as a missing field or renamed field), or that the source code has a bad query written in it.
Generally, the query issues in the source are fixed quickly because they have lots of exposure. There is one that needs to be fixed for raid_leaders (that I actually have fixed for the next push I do). In the case of your error, that is something related to bots. I don't compile with bots, so I don't really know the details of that error. Most likely, one of the EQEmu devs will need to fix something with the bot queries to stop that error from coming in.
Bots use views as if they were normal tables, which really is not ideal for our solution. They should probably be converted over to just use normal tables at some point. Unfortunately, I don't think there are any of the current EQEmu Devs actually use bots, so I am not sure when that would get fixed. Bots really need someone devoted to them that can code, and will make pull requests on Git to fix their issues.