Transaction not yet indexed

MkB6iPaYLQwnNP2AFN6Vim5Hk3whcDenScnWEBRT2FhpTQuMdxN99x8uDFQV3YkbKAwmqHXL2sETyHeLUpf8Gu8

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