Load PSBT error: Unable to decode PSBT

[foolbear]

Is there an existing issue for this?

• I have searched the existing issues

Current behaviour

"Load PSBT from ..." from menu, error shows:
Unable to decode PSBT Unsigned tx does not have empty scriptSigs and scriptWitnesses.: unspecified iostream_category error

decodepsbt and analyzepsbt show the same error too:
TX decode failed Unsigned tx does not have empty scriptSigs and scriptWitnesses.: unspecified iostream_category error (code -22)

Expected behaviour

I expect Load PSBT success.

And same procedure works fine in another wallet of test net. Both wallets are not watch-only

Steps to reproduce

I test PSBT in my wallet today, create a transaction in Bitcoin Core, click "send" and "create unsigned", then "Load PSBT from ..." from menu

I'm using prune mode for block chain. This address I made tx was obtained by importprivkey, and then covert to Descriptor Wallets by migratewallet.

I found the source code:

             case PSBT_GLOBAL_UNSIGNED_TX:
            {
                if (!key_lookup.emplace(key).second) {
                    throw std::ios_base::failure("Duplicate Key, unsigned tx already provided");
                } else if (key.size() != 1) {
                    throw std::ios_base::failure("Global unsigned tx key is more than one byte type");
                }
                CMutableTransaction mtx;
                // Set the stream to serialize with non-witness since this should always be non-witness
                UnserializeFromVector(s, TX_NO_WITNESS(mtx));
                tx = std::move(mtx);
                // Make sure that all scriptSigs and scriptWitnesses are empty
                for (const CTxIn& txin : tx->vin) {
                    if (!txin.scriptSig.empty() || !txin.scriptWitness.IsNull()) {
 ---->                  throw std::ios_base::failure("Unsigned tx does not have empty scriptSigs and scriptWitnesses.");
                    }
                }
                break;
            }

Relevant log output

no relevant log.

How did you obtain Bitcoin Core

Pre-built binaries

What version of Bitcoin Core are you using?

Bitcoin Core version v27.0.0

Operating system and version

MacOS 14.4.1

Machine specifications

No response

[maflcko]

Are you able to reproduce in regtest, with exact steps to reproduce?

[foolbear]

keywords: not watch-only wallet, prune mode, importprivkey, migratewallet.

"And same procedure works fine in another wallet of test net", but I cannot make an address with UTXOs from years ago(maybe have something to do with prune mode?).

[foolbear]

In the above issue, PSBT was created from GUI - send - create unsigned. If I create it using 'walletcreatefundedpsbt,' there is no problem. in main net.