Transaction not yet indexed

5k51RETvLGPscv5jHs7CrR2jv7QsofMSsPutZDLtf41rKJHU6CdU8gjKBWWVvaKQCv4GHBXypx1RVVdAmCgYtEKU

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