Transaction not yet indexed

MMEZC2XitCmcQZVCkBeApZCUQqg5Muw1RaXiBzVfLcGyH3D9y5a2uWhkbz6tQAjNe3cDMuCQqWxiZtK3Pzjk5EB

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