### 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_
if (record_res != DBErrors::LOAD_OK) {
            pwallet->WalletLogPrintf("%s\n", error);
        }
        result.m_result = std::max(result.m_result, record_res);
        ++result.m_records;
    }
    return result;
}
static LoadResult LoadRecords(CWallet* pwallet, DatabaseBatch& batch, const std::string& key, LoadFunc load_func)
{
    DataStream prefix;
    prefix << key;
    return LoadRecords(pwallet, batch, key, prefix, load_func);
}
static DBErrors LoadLegacyWalletRecords(CWallet* pwallet, DatabaseBatch& batch, int last_client) EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)
{
    AssertLockHeld(pwallet->cs_wallet);
    DBErrors result = DBErrors::LOAD_OK;
    
    if (pwallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
        for (const auto& type : DBKeys::LEGACY_TYPES) {
            DataStream key;
            CDataStream value(SER_DISK, CLIENT_VERSION);
            DataStream prefix;
            prefix << type;
            std::unique_ptr<DatabaseCursor> cursor = batch.GetNewPrefixCursor(prefix);
            if (!cursor) {
                pwallet->WalletLogPrintf("Error getting database cursor for '%s' records\n", type);
                return DBErrors::CORRUPT;
            }