The answer
Some hash-based schemes use limited or one-time signing indices. Reusing a one-time index can undermine security even though the construction is designed to resist quantum attacks.
What to do next
Read the wallet's index-management and backup requirements, especially before restoring on multiple devices.
QRL — Quantum-resistant ledger and wallet
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Trezor hardware wallet
A current-generation hardware wallet for managing keys; it does not make Bitcoin or Ethereum quantum-resistant or resolve a future protocol migration.
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