Transaction not yet indexed

mpExp9dwKT6WGDJNimRFvLExkJxEtyWHpj3YRAxzbeHn5Rbwvcw3ithzxbeLgJEFFRxrkW5nQMxZTAmq3gvtSLJ

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