Add index to create_at for track sent, so can remove old ones / only use new ones
Add index to create_at for track sent, so can remove old ones / only use
new ones

datauy/alaveteli,andreicristianpetcu/alaveteli,codeforcroatia/alaveteli,nzherald/alaveteli,sarhane/alaveteli-test,obshtestvo/alaveteli-bulgaria,Br3nda/alaveteli,nzherald/alaveteli,TEDICpy/QueremoSaber,4bic/alaveteli,codeforcroatia/alaveteli,Br3nda/alaveteli,Br3nda/alaveteli,sarhane/alaveteli-test,TEDICpy/QueremoSaber,sarhane/alaveteli-test,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli,10layer/alaveteli,4bic/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli,obshtestvo/alaveteli-bulgaria,nzherald/alaveteli,petterreinholdtsen/alaveteli,Br3nda/alaveteli,petterreinholdtsen/alaveteli,hasadna/alaveteli,10layer/alaveteli,andreicristianpetcu/alaveteli_old,datauy/alaveteli,TEDICpy/QueremoSaber,petterreinholdtsen/alaveteli,10layer/alaveteli,nzherald/alaveteli,4bic/alaveteli,codeforcroatia/alaveteli,codeforcroatia/alaveteli,hasadna/alaveteli,andreicristianpetcu/alaveteli,andreicristianpetcu/alaveteli,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli_old,sarhane/alaveteli-test,hasadna/alaveteli,TEDICpy/QueremoSaber,4bic/alaveteli,Br3nda/alaveteli,hasadna/alaveteli,andreicristianpetcu/alaveteli_old,obshtestvo/alaveteli-bulgaria,4bic/alaveteli,datauy/alaveteli,hasadna/alaveteli,andreicristianpetcu/alaveteli_old,hasadna/alaveteli,petterreinholdtsen/alaveteli,nzherald/alaveteli,TEDICpy/QueremoSaber