Fix duplicate items bug (#19772)
Fix duplicate items bug (#19772)


laterpay/amphtml,rsimha-amp/amphtml,zhouyx/amphtml,voyagegroup/amphtml,jmadler/amphtml,danielrozenberg/amphtml,lannka/amphtml,nexxtv/amphtml,voyagegroup/amphtml,alanorozco/amphtml,taboola/amphtml,nexxtv/amphtml,widespace-os/amphtml,danielrozenberg/amphtml,media-net/amphtml,techhtml/amphtml,zhangsu/amphtml,alanorozco/amphtml,media-net/amphtml,tlong2/amphtml,cvializ/amphtml,laterpay/amphtml,ampproject/amphtml,voyagegroup/amphtml,jpettitt/amphtml,danielrozenberg/amphtml,cvializ/amphtml,cvializ/amphtml,Gregable/amphtml,taboola/amphtml,ampproject/amphtml,honeybadgerdontcare/amphtml,ampproject/amphtml,techhtml/amphtml,sebastianbenz/amphtml,sebastianbenz/amphtml,mhc-gh/amphtml,Gregable/amphtml,src-code/amphtml,lannka/amphtml,danielrozenberg/amphtml,src-code/amphtml,media-net/amphtml,sharethrough/amphtml,mhc-gh/amphtml,zhangsu/amphtml,lannka/amphtml,mhc-gh/amphtml,techhtml/amphtml,adup-tech/amphtml,mhc-gh/amphtml,danielrozenberg/amphtml,cvializ/amphtml,laterpay/amphtml,sharethrough/amphtml,dotandads/amphtml,prateekbh/amphtml,tlong2/amphtml,zhouyx/amphtml,cvializ/amphtml,yandex-pcode/amphtml,rsimha-amp/amphtml,zhouyx/amphtml,mhc-gh/amphtml,voyagegroup/amphtml,smartadserver/amphtml,prateekbh/amphtml,lannka/amphtml,nexxtv/amphtml,techhtml/amphtml,jridgewell/amphtml,jridgewell/amphtml,media-net/amphtml,sebastianbenz/amphtml,rsimha-amp/amphtml,alanorozco/amphtml,media-net/amphtml,erwinmombay/amphtml,jpettitt/amphtml,dotandads/amphtml,danielrozenberg/amphtml,smartadserver/amphtml,widespace-os/amphtml,cory-work/amphtml,jpettitt/amphtml,widespace-os/amphtml,taboola/amphtml,tlong2/amphtml,Gregable/amphtml,zhouyx/amphtml,jridgewell/amphtml,zhangsu/amphtml,rsimha-amp/amphtml,adup-tech/amphtml,laterpay/amphtml,src-code/amphtml,yandex-pcode/amphtml,sebastianbenz/amphtml,mhc-gh/amphtml,honeybadgerdontcare/amphtml,honeybadgerdontcare/amphtml,honeybadgerdontcare/amphtml,ampproject/amphtml,ampproject/amphtml,honeybadgerdontcare/amphtml,tlong2/amphtml,dotandads/amphtml,widespace-os/amphtml,erwinmombay/amphtml,alanorozco/amphtml,techhtml/amphtml,erwinmombay/amphtml,zhouyx/amphtml,alanorozco/amphtml,mhc-gh/amphtml,tlong2/amphtml,sebastianbenz/amphtml,jpettitt/amphtml,techhtml/amphtml,cvializ/amphtml,yandex-pcode/amphtml,yandex-pcode/amphtml,sharethrough/amphtml,lannka/amphtml,ampproject/amphtml,laterpay/amphtml,adup-tech/amphtml,erwinmombay/amphtml,nexxtv/amphtml,yandex-pcode/amphtml,src-code/amphtml,erwinmombay/amphtml,mhc-gh/amphtml,jpettitt/amphtml,prateekbh/amphtml,cory-work/amphtml,yandex-pcode/amphtml,sharethrough/amphtml,jmadler/amphtml,zhangsu/amphtml,ampproject/amphtml,danielrozenberg/amphtml,zhouyx/amphtml,Gregable/amphtml,jpettitt/amphtml,tlong2/amphtml,jmadler/amphtml,nexxtv/amphtml,Gregable/amphtml,taboola/amphtml,jridgewell/amphtml,honeybadgerdontcare/amphtml,widespace-os/amphtml,zhangsu/amphtml,smartadserver/amphtml,cory-work/amphtml,lannka/amphtml,honeybadgerdontcare/amphtml,smartadserver/amphtml,prateekbh/amphtml,media-net/amphtml,ampproject/amphtml,erwinmombay/amphtml,media-net/amphtml,src-code/amphtml,Gregable/amphtml,jmadler/amphtml,rsimha-amp/amphtml,alanorozco/amphtml,laterpay/amphtml,taboola/amphtml,alanorozco/amphtml,Gregable/amphtml,voyagegroup/amphtml,cory-work/amphtml,alanorozco/amphtml,sebastianbenz/amphtml,smartadserver/amphtml,src-code/amphtml,jmadler/amphtml,prateekbh/amphtml,rsimha-amp/amphtml,rsimha-amp/amphtml,nexxtv/amphtml,voyagegroup/amphtml,zhangsu/amphtml,jpettitt/amphtml,prateekbh/amphtml,prateekbh/amphtml,jridgewell/amphtml,sharethrough/amphtml,adup-tech/amphtml,danielrozenberg/amphtml,jridgewell/amphtml,taboola/amphtml,nexxtv/amphtml,jpettitt/amphtml,jridgewell/amphtml,yandex-pcode/amphtml,lannka/amphtml,zhouyx/amphtml,adup-tech/amphtml,cory-work/amphtml,voyagegroup/amphtml,adup-tech/amphtml,cory-work/amphtml,dotandads/amphtml,smartadserver/amphtml,Gregable/amphtml,sharethrough/amphtml,media-net/amphtml,taboola/amphtml,dotandads/amphtml,dotandads/amphtml,cory-work/amphtml,jmadler/amphtml,widespace-os/amphtml