Transaction not yet indexed

Ub3753km6Sp624UET8jcXMFEdUui2mdBnMcQ97sL1PMJKhyD7Ky72fzuoQ2pdtzj5h9Y3vmqjbHZfKhNU9aLM54

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