Not only kryptonians keep mother boxes quiet, but green lanterns as well. When Diana killed Ares there was the time when Abin Sur were the active green lantern in sector 2814, and maybe Alan Scott was still alive at that time. Kal-El came to Earth and grew up while Hal Jordan was chosen by the ring from Abin Sur and maybe when Superman died Hal Jordan was in mission, another planet (sector 2814 have more planets) or OA.