Fix bug for E1687: cannot request duplicated accounts.
Fix bug for E1687: cannot request duplicated accounts.

mhhassan/expertiza,kira0992/expertiza,kira0992/expertiza,joshio1/expertiza,akshayjain114/expertiza,KunmiaoYang/expertiza,KunmiaoYang/expertiza,rmmaily/expertiza,mhhassan/expertiza,urmilparikh95/expertiza,ApertureScienceInnovators/expertiza,ApertureScienceInnovators/expertiza,KunmiaoYang/expertiza,ApertureScienceInnovators/expertiza,redsock88/expertiza,kira0992/expertiza,joshio1/expertiza,expertiza/expertiza,sid5788/expertiza,mhhassan/expertiza,sid5788/expertiza,expertiza/expertiza,michaelamoran/expertiza,urmilparikh95/expertiza,arpitashekhar/expertiza,urmilparikh95/expertiza,redsock88/expertiza,mhhassan/expertiza,arpitashekhar/expertiza,arpitashekhar/expertiza,urmilparikh95/expertiza,michaelamoran/expertiza,rmmaily/expertiza,michaelamoran/expertiza,redsock88/expertiza,akshayjain114/expertiza,akshayjain114/expertiza,expertiza/expertiza,rmmaily/expertiza,michaelamoran/expertiza,KunmiaoYang/expertiza,joshio1/expertiza,joshio1/expertiza,arpitashekhar/expertiza,redsock88/expertiza,expertiza/expertiza,kira0992/expertiza,sid5788/expertiza,akshayjain114/expertiza,ApertureScienceInnovators/expertiza,rmmaily/expertiza,sid5788/expertiza