Transaction not yet indexed

Am8Cdoy6ViUUdGpvuXxVpWdsvuYLziKCtsPQzDLiktzWw52RGjT5nii9fbPYuMFU3QfhvFbQfy3eX8wqQuYEhF9

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