ISPconfig 3.1b2 Unknown column 'client.contact_firstname' in 'field list'

Hello dev team,

I installed ISPConfig 3.0.5.4p9 on a fresh Debian 8.4 64bit dedi and updated to 3.1b2 afterwards.

(Installing of 3.0.5.4p9 was done by auto install script https://github.com/servisys/ispconfig_setup/archive/master.zip)

Issues: Adding a client isn't possible (no client shows up in client's list) Adding a website isn't possible and results in an error message: Unknown column 'client.contact_firstname' in 'field list' Same error with EMAIL, DNS...

Perhaps a bug?

N.B. During update process I reconfigured master database permissions.

Best Alf