Transaction not yet indexed

661CU91gMgYMJUSz4NqntYoYDF9PZUotsmMdj5V9zFMWM3Hnerm7nXSZFp4wRLrD6mnM5x3i7TEmSNP3AT5USVv4

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