Transaction not yet indexed

5191p1tntS8NUKv6SjdVcUtqpdEFQRqPrN6wWVMc6DbP96idxaCmP8H8j3sZCPuqJ9K4Pe4dLHeBdJM6ink1kHo4

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