Error codes / Metaplex Token Metadata
DuplicateCreatorAddress
Metaplex Token Metadata · Custom(60) · 0x3c
custom program error: 0x3c
What it means
The program keeps a nonce per order and this one was already used: the same order was sent twice and the second copy failed. The first copy is the one that counts; there is nothing to resend.
The program's own message: “No duplicate creator addresses”
What to do
The error name is the program's own diagnosis. Paste the failed transaction into TxWhy to see which instruction raised it and with which accounts.
Have the transaction that failed with this?
Paste its signature. TxWhy shows the exact instruction and inner call that raised the error, and rebuilds the transaction when the cause is one it can fix (compute limit, expired blockhash, priority fee, a stale swap quote or a moved limit).