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DB Query Error #5

SELECT mss.*, msss.* FROM M_SHOP_STAFF mss INNER JOIN M_SHOP_STAFF_SHIFT msss ON mss.m_s_s_no = msss.m_s_s_no WHERE mss.sys_sm_no = '' AND msss.sys_sm_no = '' AND mss.m_s_s_nonreserve = 0 AND msss.m_s_s_s_date >= '' AND msss.m_s_s_s_date <= '' AND msss.m_s_s_s_starttime IS NOT null AND msss.m_s_s_s_endtime IS NOT null AND msss.m_s_s_s_shiftrelease = 1 ORDER BY msss.m_s_s_s_date ASC, msss.m_s_s_s_starttime ASC