### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current behaviour

I randomly encountered this by loading a wallet created from master with an older version. I could trace it down to bd13dc2f46ea10302a928fcf0f53b7aed77ad260 (#26076), but I don't know descriptor wallets enough to understand what's going on (cc @Sjors @achow101).

### Expected behaviour

`bitcoind` starts, or at least tells me to use a later version if #26076 was a breaking change instead of corrupting `wallet.dat`.

### Steps to reproduce

(master, clean chain): 
`createwallet -regtest ""`
(v25.0rc2):
first `bitcoind -regtest` succeeds
then stop and restart the node: The second `bitcoind -regtest` leads to an InitError:
`Error: Error: Unable to expand wallet descriptor from cache`
now, the wallet cannot be loaded by either version.

### Relevant log output

_No response_

### How did you obtain Bitcoin Core

Compiled from source

### What version of Bitcoin Core are you using?

v25.0rc2 / master

### Operating system and version

Ubuntu

### Machine specifications

_No response_
{
    for (const auto& parent_xpub_pair : cache.GetCachedParentExtPubKeys()) {
        if (!WriteDescriptorParentCache(parent_xpub_pair.second, desc_id, parent_xpub_pair.first)) {
            return false;
        }
    }
    for (const auto& derived_xpub_map_pair : cache.GetCachedDerivedExtPubKeys()) {
        for (const auto& derived_xpub_pair : derived_xpub_map_pair.second) {
            if (!WriteDescriptorDerivedCache(derived_xpub_pair.second, desc_id, derived_xpub_map_pair.first, derived_xpub_pair.first)) {
                return false;
            }
        }
    }
    for (const auto& lh_xpub_pair : cache.GetCachedLastHardenedExtPubKeys()) {
        if (!WriteDescriptorLastHardenedCache(lh_xpub_pair.second, desc_id, lh_xpub_pair.first)) {
            return false;
        }
    }
    return true;
}
bool WalletBatch::WriteLockedUTXO(const COutPoint& output)
{
    return WriteIC(std::make_pair(DBKeys::LOCKED_UTXO, std::make_pair(output.hash, output.n)), uint8_t{'1'});
}
bool WalletBatch::EraseLockedUTXO(const COutPoint& output)
{
    return EraseIC(std::make_pair(DBKeys::LOCKED_UTXO, std::make_pair(output.hash, output.n)));
}
bool LoadKey(CWallet* pwallet, DataStream& ssKey, DataStream& ssValue, std::string& strErr)