Merge branch 'music_detail'

mec-biz/src/main/resources/config/mybatis/StudentRegistrationMapper.xml

@@ -1594,7 +1594,7 @@
         si.goods_brand_ goodsBrand,si.goods_name_ goodsName,si.specification_ specification,si.create_time_ goodsBuyTime,si.start_time_ insuranceStartTime,si.end_time_ insuranceEndTime
 		from student_registration sr LEFT JOIN sys_user u on sr.user_id_ = u.id_ 
 		LEFT JOIN student s on s.user_id_ = sr.user_id_ LEFT JOIN `subject` sub on sub.id_ = sr.actual_subject_id_
-		LEFT JOIN student_instrument si on si.student_id_ = sr.user_id_
+		LEFT JOIN (select * from student_instrument where id_ in ((select max(id_) from student_instrument group by student_id_))) si on si.student_id_ = sr.user_id_
 		WHERE sr.music_group_status_ = 'NORMAL' 
 		<if test="musicGroupId != null">
 			AND sr.music_group_id_ = #{musicGroupId}