Transaction not yet indexed

MndmR18WDQQEsoKAkD2DFrC9hGz8DRvCAQYJWRyj3n5KNHmqaZzofvGFzqkonhuHyhGkF7AoNMgF1QvuiM4UbEh

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