Bitcoin Core 32 GUI PSBT v2 format may stall multisig signing on older nodes

Bitcoin Core 32's graphical wallet creates PSBT v2 files that older Core co-signers reportedly cannot import, which can interrupt co-signing workflows. This compatibility issue has been moved to the 32.1 milestone, and a proposed GUI fix remains open. Users can bypass this format mismatch by explicitly creating PSBT v0 via Core 32's RPC interface using psbt_version=0.