Transaction not yet indexed

MePXtaRNmDMbYrFSUfCddw6y7iwi7pNFBqAFDqBd5gyZ8QDkXc2q8moCQ3B3HJ1LQqy8M51U2CkzexhtMW4Rvv2

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