Transaction not yet indexed

Mex6CSo5TtkBmRWivE5yfrHGeHUX1o7EMTwdXJfBvvmAkANEQJXPEMuBT4Ju1mrLFEKeA16YJNp8eJZfz1ZJDVQ

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