[FIX] users cant save any record constraint problem

[Ariel E. Figueroa - http://www.humanytek.com]

Hi team:

Please help me with this issue, one duplicate value in database are causing one constraint avoid save any record in the db.

2014-09-29 23:02:16,378 17246 ERROR glp openerp.netsvc: Error de integridad
duplicate key value violates unique constraint "mail_followers_pkey"
DETAIL: Key (id)=(211127) already exists.
Traceback (most recent call last):
  File "/home/openerp/server/openerp/netsvc.py", line 292, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/openerp/server/openerp/service/web_services.py", line 626, in dispatch
    res = fn(db, uid, *params)
  File "/home/openerp/server/openerp/osv/osv.py", line 188, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/home/openerp/server/openerp/osv/osv.py", line 174, in wrapper
    netsvc.abort_response(1, _('Integrity Error'), 'warning', inst[0])
  File "/home/openerp/server/openerp/netsvc.py", line 71, in abort_response
    raise openerp.osv.osv.except_osv(description, details)
except_osv: (u'Error de integridad', 'duplicate key value violates unique constraint "mail_followers_pkey"\nDETAIL: Key (id)=(211127) already exists.\n')
2014-09-29 23:02:16,379 17246 INFO glp werkzeug: 192.168.1.84 - - [29/Sep/2014 23:02:16] "POST /web/dataset/call_button HTTP/1.1" 200 -