Duplicate GTINs in `oddb_article.xml`, check for duplicate GTINs in `oddb_article.xml`

[zdavatz]

1. The file oddb_articlecontains duplicate GTINs.
2. One GTIN has the active agent, the other does not.
3. Where does the GTIN without active agent come from? I guess that one can be skipped.

   "7680290800622"        
   "7680295500015"        
   "7680295501661"        
   "7680295501746"        
   "7680295501906"        
   "7680295502040"        
   "7680295502125"        
   "7680295502200"        
   "7680295503016"        
   "7680295503368"        
   "7680295503870"        
   "7680295504099"        
   "7680295506970"        
   "7680295507007"        
   "7680295507199"        
   "7680295507274"        
   "7680295507359"        
   "7680295507434"        
   "7680295507519"        
   "7680295508851"        
   "7680295511035"        
   "7680295511110"        
   "7680295511387"        
   "7680295511462"        
   "7680295511547"        
   "7680295511974"        
   "7680295512438"        
   "7680295512513"        
   "7680295520105"        
   "7680295520891"        
   "7680295520907"        
   "7680295540011"        
   "7680295540028"        
   "7680295541452"        
   "7680295541537"        
   "7680295542183"        
   "7680295542268"        
   "7680295542343"        
   "7680295544125"        
   "7680295544200"        
   "7680295545689"        
   "7680295545764"        
   "7680295545849"        
   "7680295545924"        
   "7680295546143"        
   "7680295546655"        
   "7680295546990"        
   "7680295547027"        
   "7680295547058"        
   "7680295547065"        
   "7680295547072"        
   "7680295547102"        
   "7680295550621"        
   "7680317540548"        
   "7680317540623"        
   "7680330990375"        
   "7680341860308"        
   "7680357090102"        
   "7680357090454"        
   "7680357973276"        
   "7680382052694"        
   "7680382072371"        
   "7680382072456"        
   "7680382072531"        
   "7680382072883"        
   "7680382072968"        
   "7680382073262"        
   "7680424410154"        
   "7680428090123"        
   "7680428472165"        
   "7680434680226"        
   "7680434681384"        
   "7680434681704"        
   "7680434684217"        
   "7680434693561"        
   "7680434693806"        
   "7680434694025"        
   "7680434694100"        
   "7680434694377"        
   "7680435571578"        
   "7680435571653"        
   "7680440650015"        
   "7680441350198"        
   "7680445210160"        
   "7680457940161"        
   "7680457941489"        
   "7680457941564"        
   "7680457942028"        
   "7680457942103"        
   "7680457942387"        
   "7680457942394"        
   "7680457942400"        
   "7680457942431"        
   "7680458800280"        
   "7680458820202"        
   "7680466130010"        
   "7680466861440"        
   "7680471601543"        
   "7680476140825"        
   "7680479980428"        
   "7680480180251"        
   "7680488220102"        
   "7680493580161"        
   "7680496380195"        
   "7680497960136"        
   "7680499994962"        
   "7680504450704"        
   "7680504450971"        
   "7680504451008"        
   "7680504451190"        
   "7680504451275"        
   "7680511790213"        
   "7680515940454"        
   "7680516711206"        
   "7680517030146"        
   "7680523030017"        
   "7680523030284"        
   "7680525730014"        
   "7680525740013"        
   "7680527280012"        
   "7680527290011"        
   "7680527310016"        
   "7680528100197"        
   "7680539051846"        
   "7680539051884"        
   "7680539051907"        
   "7680543660270"        
   "7680545170173"        
   "7680548790019"        
   "7680548790026"        
   "7680548790033"        
   "7680548790163"        
   "7680548790248"        
   "7680548790408"        
   "7680548790415"        
   "7680549590281"        
   "7680554460029"        
   "7680555610010"        
   "7680555670120"        
   "7680555670366"        
   "7680555670380"        
   "7680555670410"        
   "7680555670427"        
   "7680555670434"        
   "7680555960016"        
   "7680559660097"        
   "7680559660103"        
   "7680563550223"        
   "7680567580110"        
   "7680574340011"        
   "7680574340035"        
   "7680574340073"        
   "7680574340110"        
   "7680575400011"        
   "7680575400035"        
   "7680575400059"        
   "7680577200015"        
   "7680577240011"        
   "7680584040086"        
   "7680584040093"        
   "7680588690072"        
   "7680588690089"        
   "7680588690096"        
   "7680588690102"        
   "7680590620012"        
   "7680594720084"        
   "7680615010033"        
   "7680615160127"        
   "7680618130028"        
   "7680624420014"        
   "7680625690164"        
   "7680625690171"        
   "7680625690195"        
   "7680625690218"        
   "7680625700177"        
   "7680625700191"        
   "7680625700214"        
   "7680625700238"        
   "7680628040027"        
   "7680628040065"        
   "7680628040072"        
   "7680628040096"        
   "7680652190019"        
   "7680652830021"        
   "7680652830038"        
   "7680652830052"        
   "7680652830083"        
   "7680652830106"        
   "7680652830120"        
   "7680654500045"        
   "7680655340015"        
   "7680656890014"        
   "7680657240016"        
   "7680657240023"        
   "7680657260038"        
   "7680657780017"        
   "7680658160023"        
   "7680658520018"        
   "7680658520025"        
   "7680658520032"        
   "7680661500038"        
   "7680665400013"        
   "7680668820023"        
   "7680669940072"        
   "7680669940096"        
   "7680669940119"        
   "7680672780016"        
   "7680680870075"        
   "7680682220021"