Fields must be unique per site

changed milestone to %2.0a2

created merge request !250 (merged) to address this issue

mentioned in merge request !250 (merged)

added part::backend prio::1 type::bug labels

unassigned @nik

added board::ready label

We should research whether someone™ already made a Django app that combines every constraints on models that are associarted with django sites with the site_id field.

added board::todo label and removed board::ready label

assigned to @fph

assigned to @lloydmeins and unassigned @fph

added board::ready label and removed board::todo label

assigned to @nik and unassigned @lloydmeins

closed with merge request !250 (merged)

mentioned in commit c947120e