Update Payment indexes to be sparse
Update Payment indexes to be sparse

Have already applied manually in production.

javatlacati/codecombat,icodegame/codecombat,javatlacati/codecombat,kidaa/codecombat,kidaa/codecombat,codecombat/codecombat,javatlacati/codecombat,kidaa/codecombat,codecombat/codecombat,codecombat/codecombat,icodegame/codecombat,icodegame/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,jeremiahyan/codecombat,jeremiahyan/codecombat,kidaa/codecombat,icodegame/codecombat,codecombat/codecombat,jeremiahyan/codecombat,codecombat/codecombat,javatlacati/codecombat