works suggest returns duplicate

[ntra00]

this is what the suggest service returns for that query.
You can see the duplicated uri/id.
http://mlvlp04.loc.gov:8230/resources/works/suggest/?count=50&q=pjesma%20o%20cidu

["pjesma o cidu", ["Pjesma o Cidu (Cantar de mio Cid. Spanish) ","Pjesma o Cidu (Zagreb, Croatia)","Pjesma o Cidu (Cantar de mio Cid. Spanish)"], ["1 result","1 result","1 result"], ["http://id.loc.gov/resources/works/e54732597314021225085117477061974175774","http://id.loc.gov/resources/works/e2019479463","http://id.loc.gov/resources/works/e54732597314021225085117477061974175774"], ["e54732597314021225085117477061974175774","e2019479463","e54732597314021225085117477061974175774"]]