When the field used to build a pie chart or a bar chart is not a list field, then we got a fatal error.
Worst, as the data is cached in session, updating manually the database is not sufficient, we must force users to logout in order to clean the session and retrieve the latest data.
The ideal would be to not have wrong data in the database, however until we fix the root cause (due to tv3 - tv5 migration), we should not display a blank page to the end user.