Update jupyterhub and sqlite

Since performing a full package update with conda, users of my jupyterhub server get an internal server error when they run an ipynb file. I forgot to make a backup of the jupyterhub.sqlite file, is this the problem? The admin user can run his ipynb files without any problem though. Does anyone have any idea to fix this problem? Thank you in advance.

Problem fixed, when updating to jupyterhub 1.1.0 there were some rights changes on some files.