# Buggy code
def release_selfservice(request, mail_id):
    rcpt = request.GET.get("rcpt", None)
    secret_id = request.GET.get("secret_id", None)
    if rcpt is None or secret_id is None:
        raise BadRequest(_("Invalid request"))
    try:
        msgrcpt = get_wrapper().get_recipient_message(rcpt, mail_id)
    except Msgrcpt.DoesNotExist:
        raise BadRequest(_("Invalid request"))
    if secret_id != msgrcpt.mail.secret_id:
        raise BadRequest(_("Invalid request"))
    if parameters.get_admin("USER_CAN_RELEASE") == "no":
        msgrcpt.rs = "p"
        msg = _("Request sent")
    else:
        amr = AMrelease()
        result = amr.sendreq(mail_id, secret_id, rcpt)
        if result:
            rcpt.rs = "R"
            msg = _("Message released")
        else:
            raise BadRequest(result)
    msgrcpt.save()
    return render_to_json_response(msg)


# Traceback (IntegrityError)
Internal Server Error: /quarantine/process/
Traceback (most recent call last):
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
response = callback(request, *callback_args, **callback_kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 25, in _wrapped_view
return view_func(request, *args, **kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/views.py", line 307, in process
return release(request, ids)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/lib.py", line 30, in wrapped_f
return f(request, *args, **kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/views.py", line 282, in release
rcpt.save()
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/base.py", line 546, in save
force_update=force_update, update_fields=update_fields)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/base.py", line 626, in save_base
rows = manager.using(using).filter(pk=pk_val)._update(values)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/query.py", line 605, in _update
return query.get_compiler(self.db).execute_sql(None)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 1020, in execute_sql
cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 846, in execute_sql
cursor.execute(sql, params)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/util.py", line 41, in execute
return self.cursor.execute(sql, params)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 122, in execute
six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 120, in execute
return self.cursor.execute(query, args)
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 174, in execute
self.errorhandler(self, exc, value)
File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
IntegrityError: (1062, "Duplicate entry '0-NTFOxSLhytYl-1' for key 'PRIMARY'")

# Fixed code
def release_selfservice(request, mail_id):
    rcpt = request.GET.get("rcpt", None)
    secret_id = request.GET.get("secret_id", None)
    if rcpt is None or secret_id is None:
        raise BadRequest(_("Invalid request"))
    wrapper = get_wrapper()
    try:
        msgrcpt = wrapper.get_recipient_message(rcpt, mail_id)
    except Msgrcpt.DoesNotExist:
        raise BadRequest(_("Invalid request"))
    if secret_id != msgrcpt.mail.secret_id:
        raise BadRequest(_("Invalid request"))
    if parameters.get_admin("USER_CAN_RELEASE") == "no":
        wrapper.set_msgrcpt_status(rcpt, mail_id, "p")
        msg = _("Request sent")
    else:
        amr = AMrelease()
        result = amr.sendreq(mail_id, secret_id, rcpt)
        if result:
            wrapper.set_msgrcpt_status(rcpt, mail_id, "R")
            msg = _("Message released")
        else:
            raise BadRequest(result)
    return render_to_json_response(msg)