Hasura error with GENERATED ALWAYS

gistfile1.txt

graphql_1   | {
  "timestamp": "2018-11-17T18:09:55.628+0000",
  "level": "info",
  "type": "http-log",
  "detail": {
    "status": 500,
    "query_hash": "cb9097259d9674a46228be3b19979abd7f46b6aa",
    "http_version": "HTTP/1.1",
    "query_execution_time": 0.014521827,
    "request_id": null,
    "url": "/v1alpha1/graphql",
    "ip": "172.19.0.1",
    "response_size": 1166,
    "user": {
      "x-hasura-role": "login",
      "x-hasura-user-id": "-1"
    },
    "method": "POST",
    "detail": {
      "error": {
        "internal": {
          "statement": "WITH \"public_user__mutation_result_alias\" AS (INSERT INTO \"hdb_views\".\"login__insert__public__user\" ( \"email\", \"created\", \"username\", \"modified\", \"password\", \"emailverified\", \"id\" ) VALUES ( $1, DEFAULT, $2, DEFAULT, DEFAULT, $3, DEFAULT )  RETURNING * ) SELECT  json_build_object('response', (SELECT  coalesce((json_agg(\"root\" )->0), 'null' ) AS \"root\" FROM  (SELECT  row_to_json((SELECT  \"_1_e\"  FROM  (SELECT  \"_0_root.base\".\"id\" AS \"id\"       ) AS \"_1_e\"      ) ) AS \"root\" FROM  (SELECT  *  FROM \"public_user__mutation_result_alias\" WHERE ('true')     ) AS \"_0_root.base\"      ) AS \"_2_root\"      ) )        ",
          "prepared": true,
          "error": {
            "exec_status": "FatalError",
            "hint": "Use OVERRIDING SYSTEM VALUE to override.",
            "message": "cannot insert into column \"id\"",
            "status_code": "428C9",
            "description": "Column \"id\" is an identity column defined as GENERATED ALWAYS."
          },
          "arguments": [
            "(Oid 25,Just (\"[email protected]\",Binary))",
            "(Oid 25,Just (\"un\",Binary))",
            "(Oid 16,Just (\"\\SOH\",Binary))"
          ]
        },
        "path": "$.selectionSet.insert_user.args.objects[0]",
        "error": "postgres query error",
        "code": "postgres-error"
      },
      "request": "{\"query\":\"mutation($email:String, $username:String, $access_token:String, $facebook_id:String) {\\n\\tinsert_user(objects:{\\n    email: $email,\\n    username:$username,\\n    emailverified:true,\\n    facebook_tokens: {\\n      data: {\\n        access_token:$access_token,\\n        facebook_id:$facebook_id\\n      }\\n    }\\n  }) {\\n    returning {\\n      id\\n    }\\n\\t}\\n}\",\"variables\":{\"email\":\"[email protected]\",\"username\":\"un\",\"access_token\":\"Testing\",\"facebook_id\":\"123\"}}"
    }
  }
}