Encountered a duplicated sql alias [xxxx] during auto-discovery of a native-sql query

Hibernate: 
    SELECT
        avg(quality) as quality ,
        max(server_time) as server_time ,
        min(source_time) as source_time,
        count(tag) as tag ,
        sum(value) as value,
        sum(quality) as quality  
    FROM
        metrics 
    left join
        tags  
            on metrics.tag =  tags.node_id  
    where
        metrics.tag =?  
        and server_time