Transaction not yet indexed

2521CUJ1UAgqQmEzkFvLFZrwVLsYf6f2qan7RMsZmSrxCr3YZvsJXiovyk65vfzEisX7pYtbt1R1Y1axNEUXDhA1

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