Assignment without any Submission types and Use marking workflow to Yes

When I create assignment without any submission type selected and using the workflow marking to yes, when I try to order by user Status on view/grade all submissions mod/assign/view.php?id=XXX&action=grading we got a Database error message.

The problem is that creates the following SQL

SELECT
u.id,u.picture,u.firstname,u.lastname,u.firstnamephonetic,u.lastnamephonetic,u.middlename,u.alternatename,u.imagealt,u.email, u.id as userid, s.status as status, s.id as submissionid, s.timecreated as firstsubmission, s.timemodified as timesubmitted, s.attemptnumber as attemptnumber, g.id as gradeid, g.grade as grade, g.timemodified as timemarked, g.timecreated as firstmarked, uf.mailed as mailed, uf.locked as locked, uf.extensionduedate as extensionduedate, uf.workflowstate as workflowstate, uf.allocatedmarker as allocatedmarker
FROM mdl_user u
LEFT JOIN ( SELECT mxs.userid, MAX(mxs.attemptnumber) AS maxattempt
FROM mdl_assign_submission mxs
WHERE mxs.assignment = '6085' GROUP BY mxs.userid ) smx ON u.id = smx.userid
LEFT JOIN ( SELECT mxg.userid, MAX(mxg.attemptnumber) AS maxattempt
FROM mdl_assign_grades mxg
WHERE mxg.assignment = '6085' GROUP BY mxg.userid ) gmx ON u.id = gmx.userid
LEFT JOIN mdl_assign_submission s ON
u.id = s.userid AND
s.assignment = '6085' AND
s.attemptnumber = smx.maxattempt
LEFT JOIN mdl_assign_grades g ON
u.id = g.userid AND
g.assignment = '6085' AND
g.attemptnumber = gmx.maxattempt
LEFT JOIN mdl_assign_user_flags uf ON u.id = uf.userid AND uf.assignment = '6085'
WHERE u.id IN ('888','687','1049','1548','1523','1151','1530','769','437','1042','1051','1131','1654','1770','1756','1227','1233','1632','1336','1685','53','55','1071','1747','56','1423','1831','1639','1631','1560','1708','1286','1194','1554','1008','1390','1706','1513','603','1805','1798','435','1409','1296','1601','1761','1772','1097','1339','1544','999','1085','1660','67','1701','1588','1781','1055','1340','808','1655','71','1324','1329','1333','938','439','588','1570','853','1681','1115','1556','765','1774','1620','1220','1814','944','77','1827','1762','1205','1719','752','1507','1816','1585','953','1674','1241','1641','433','733','1670','1780','1758','401','1837','1156','1688','1602','1569','1603','1684','1516','1792','962','1181','1116','1623','1580','1771','1515','84','1424','1436','1439','1244','959','1323','86','1211','683','1610','1550','1500','1721','492','89','1312','1128','1800','1733','1726','764','1549','814','748','1739','1021','1807','93','1300','1279','934','1551','1189','95','458','99','1165','102','1703','1734','1532','598','104','453','1308','1846','428','1223','1821','1218','780','1405','107','863','1716','1785','452','1577','1849','1584','1155','1519','1575','427','1377','1511','1741','110','1832','1373','1547','1529','1645','584','1735','495','771','1848','1736','112','1009','113','1574','1571','745','1673','507','1420','116','688','469','644','1578','1369','1419','1851','1725','1694','1209','1326','1759','1162','122','1691','931','643','1538','1618','1528','728','1186','124','1370','1202','506','678','802','1546','513','399','1555','996','805','928','1806','1817','1699','1587','1294','1801','1509','844','1026','1599','1696','132','137','1757','1712','423','957','1581','1498','1238','1640','595','716','134','1190','941','744','1833','1682','641','593','1707','1016','1261','467','140','1072','1745','1769','1108','621','779','1646','1095','1847','1812','1522','1521','1627','743','1273','1558','155','150','1690','742','1254','741','1292','1636','1704','1819','639','449','1649','1109','933','973','762','1012','1174','1619','1740','1803','1783','1356','976','1346','1697','770','618','1319','1828','1693','1314','1325','870','1394','1779','988','1612','1354','1663','1744','1505','171','1389','1367','1643','1564','1705','1753','1541','857','172','1773','1635','972','1591','1170','1628','1501','1121','1010','1527','615','1838','1767','1615','1582','790','519','179','1589','1782','477','1829','1642','1616','782','777','1411','1622','1850','476','1714','1124','859','1514','494','1537','1835','1840','1506','500','1572','1764','1614','1752','1005','1397','1318','1818','1613','1653','1499','485','1036','1562','1000','1414','761','1750','1746','1748','1141','1644','1823','1457','1127','1662','1163','456','1788','209','849','1600','1738','1099','1648','475','210','1731','674','1596','1794','1787','760','1686','1598','1718','1406','1789','1586','1224','1402','1278','1197','484','1290','1058','447','1081','1425','510','1535','1715','1381','1668','1450','1775','1630','1777','978','1568','231','1542','1039','232','446','1360','1563','1545','1536','1540','975','1617','1567','1658','1755','238','792','1330','1722','483','1206','1592','1240','1427','1826','1607','1820','1328','1111','1583','1595','1804','1070','1303','525','707','1047','1749','1811','248','1754','1557','251','1822','1362','445','252','1503','1611','253','1096','1159','383','1634','1720','416','1504','1683','259','1553','1751','465','1799','1637','1518','1552','1791','1839','800','1813','1626','989','1524','1605','1717','1650','1675','1676','1664','1680','1510','1647','1576','264','737','1621','270','1604','993','1638','1088','1723','1710','464','1068','271','1172','1061','1651','1624','1508','1533','609','1778','1671','1808','1146','278','413','1594','1565','1305','1221','705','1730','704','1825','1289','736','1283','1841','1184','1512','1802','1139','1776','1724','1107','1531','412','1809','1579','759','1260','1048','1656','288','289','997','1609','1200','632','1629','1743','1766','841','701','1351','1590','1262','292','293','294','1689','1711','408','1692','1293','1217','812','1836','960','1593','1852','1561','1606','303','1698','1379','1534','1177','304','1059','1129','1270','1277','1713','1110','1608','1065','1410','397','1678','1687','1035','929','1543','1573','498','1657','1123','1502','482','1732','1830','629','497','1784','1416','1737','1652','605','758','1192','591','1810','735','1729','1797','1672','1702','1539','1677','592','1332','1728','322','1140','650','1666','1727','795','1763','522','1796','1700','855','801','1103','325','1566','326','1407','1625','846','1520','1667','1359','1526','328','1695','589','1786','1659','1525','1517','1253','329','1790','1633','1178','1014','755','731','1665','1597','331','754','1382','1321','1669','332','1045','1251','734','1661','1765','1815','516','1793','1742','662','1132','1679','336','935','1265','1709','1768','1795','856','1122','1431','1824','693','1559','627','480','1225','1760','1834','1093','461')
ORDER BY workflowstatus;

but the ORDER BY column doesn't exist.

I think that the problem could be fix changing gradingtable.php file on line 281 on which the columname assigned to the array is wrong, I change it to 'workflostate' and it works!

If I'm wrong let check it out how to fix it properly.

Thanks for all