Transaction not yet indexed

2i51MFrUqd1nVKk34tQW9BkVE6wfwqcb2Q7vupxmsz8oCLUu4GVZNwskTWS7ntYJa5rXux8qce1E1QvkRQEUpTRE

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