Transaction not yet indexed

u1MMUnbLZ9uaeyDYwpos9YePqFN4tGhZSW6qTPPSQmFtLMHueZfwQV3hqWHFevwKsmecbZrLoaLk6vQeWwHREqE

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