Transaction not yet indexed

Nmk9cMabgAmNsn2JtNSeRreim6JT5XQWSbcxjAHc2DZt6YK6TJEicQuTnbbCMTPu3mXrVqTe6AMeG6uYvT8eiAA

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