"id" : 0,
  "error" : [
    "could not serialize access due to concurrent update\n",
    "Traceback (most recent call last):\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/wsgipy\", line 47, in dispatch_request\n    return endpoint(request, **requestview_args)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/protocols\/dispatcherpy\", line 59, in rpc\n    request, database_name, *requestparams)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/wsgipy\", line 38, in auth_required\n    if requestuser_id:\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/werkzeug\/utilspy\", line 73, in __get__\n    value = selffunc(obj)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/protocols\/wrapperspy\", line 61, in user_id\n    database_name, authusername, authpassword, cache=False)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/securitypy\", line 26, in login\n    user_id = Userget_login(loginname, password)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/res\/userpy\", line 490, in get_login\n    clswrite([user], {'last_login_date': Datetoday()})\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/modules\/company\/companypy\", line 270, in write\n    super(User, cls)write(*args)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/res\/userpy\", line 254, in write\n    super(User, cls)write(*args)\n  File \"\/opt\/tryton-40\/local\/lib\/python27\/site-packages\/trytond\/model\/modelsqlpy\", line 927, in write\n    where=red_sql))\nTransactionRollbackError: could not serialize access due to concurrent update\n\n"
  ]