Transaction not yet indexed

a156NGR1AzVAtggqq3uKAKpUGFaV4jFVnZPQk9kUqhoRkAUzbbewB5DLNtoBJpGupKgfVisQ4FkxqytTnkndeAz

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.