Transaction not yet indexed

21M6Sm34Avtz6UTwhm9ChjwD6oLSdfLWCpfDzpusrTg9rMCH1rSA7ZL3UPWNFX1YBiVYgt5rwtNQgo5UTQqX8Fs5

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