Adding new organization gives duplicate key value database error

[MikkoJo]

Start of the error message:
IntegrityError at /admin/base_page/organizationsetting/add/

duplicate key value violates unique constraint "base_page_citysetting_site_id_key"
DETAIL:  Key (site_id)=(1) already exists.

Request Method:     POST
Request URL:    http://localhost:8000/admin/base_page/organizationsetting/add/
Django Version:     1.4.1
Exception Type:     IntegrityError
Exception Value:    

duplicate key value violates unique constraint "base_page_citysetting_site_id_key"
DETAIL:  Key (site_id)=(1) already exists.

Likely cause:
Change from citysettings to organizationsettings left all indices, sequences and constraints in database to use names and references like base_page_citysettings...

[MikkoJo]

This is more like a documentation flaw. There can be only one organization per site.

[ksnabb]

I think this was closed on mistake