Question on Dhammapada Verse 30

I am trying to understand the meaning of the verse below: Verse 30 from Dhammapada . > *Appamadena maghava > devanam setthatam gato > appamadam pasamanti > pamado garahito sada.* > "By Heedfulness did Indra become the overlord of the gods. Heedfulness > is ever praised, and heedlessness ever despised." - Acharya > Buddharakkhita's translation of Dhammapada 30 . In above verse the word "*maghava*" is a Vedic word which means Lord Indra of Vedic times. During "Vedic Brahmanism", Lord Indra is superior of all gods. Does this verse means that Buddha accepted the existence of Gods? Also the verse mentions that because of *appamada*, Indra become the overlord. Does it mean Lord Indra has the insight of Nibbana ? Appreciate your answer.