Namespace query

Why does this query produce clone results (in italics) and how can I prevent this?

 {{#ask:
 [[user:+]]  
 |limit=50
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Result: Jaideraf/Sandbox, Jaideraf/Sandbox/3, Jaideraf/Sandbox, Jaideraf/Sandbox/3, Jaideraf/Sandbox/3, Jaideraf/Sandbox, Jaideraf/Sandbox/3, Jaideraf/Sandbox/3, 127.0.0.1, 20160427, 20160805, 20180106 kghbln, 20200307UPEP, 20201104, 24pm, 3ct3pu3, 4L8, 91.64.57.179, Jaideraf/Sandbox/2, Christian Wagner/A A AA, Christian Wagner/A B AA, Christian Wagner/AA AA, Christian Wagner/B A AA, Christian Wagner/B B AA, AMykolaD, AZaim, Aaee, Abs, Acnetj, AdSvS, Adbe, Ahmad, Ahmsaqib, Airbck, Aki, AktenzeichenXY, Akuckartz, Akuckartz, Alantygel, Albbas, AlessiaCal, Alex Mashin, Alexandr Efremov, Alexc, Alexey Gorobecky, Alexey Gorobecky, Alexey Gorobecky, Alexey Gorobecky, Alexey Gorobecky, Alexey Gorobecky... autres résultats