|  | @@ -26,6 +26,7 @@ import org.springframework.context.annotation.Lazy;
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				|  |  |  import org.springframework.http.HttpStatus;
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				|  |  |  import org.springframework.stereotype.Service;
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				|  |  |  import org.springframework.transaction.annotation.Isolation;
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				|  |  | +import org.springframework.transaction.annotation.Propagation;
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				|  |  |  import org.springframework.transaction.annotation.Transactional;
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				|  |  |  import org.springframework.util.CollectionUtils;
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				|  |  |  
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				|  | @@ -973,7 +974,7 @@ public class ContractServiceImpl implements ContractService, InitializingBean {
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				|  |  |  	}
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				|  |  |  
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				|  |  |  	@Override
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				|  |  | -	@Transactional(rollbackFor = Exception.class, isolation = Isolation.READ_COMMITTED)
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				|  |  | +	@Transactional(rollbackFor = Exception.class, isolation = Isolation.READ_COMMITTED, propagation = Propagation.REQUIRES_NEW)
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				|  |  |  	public boolean transferProduceContract(Integer userId,String musicGroupId) {
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				|  |  |  		SysUser user = studentDao.lockUserReturnInfo(userId);
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