I have 2 legacy wallets and on both if I run `upgradewallet` it will cause bitcoin core to crash. This should just return me an error string

Currenl result from `getwalletinfo`:
```
{
  "walletname": "Wallet",
  "walletversion": 169900,
  "format": "bdb",
  "balance": 0.00000000,
  "unconfirmed_balance": 0.00000000,
  "immature_balance": 0.00000000,
  "txcount": 80,
  "keypoololdest": 1613078825,
  "keypoolsize": 941,
  "keypoolsize_hd_internal": 941,
  "paytxfee": 0.00000000,
  "private_keys_enabled": false,
  "avoid_reuse": true,
  "scanning": false,
  "descriptors": false
}
```
case TxoutType::WITNESS_V0_KEYHASH:
    {
        if (sigversion == IsMineSigVersion::WITNESS_V0) {
            
            return IsMineResult::INVALID;
        }
        if (sigversion == IsMineSigVersion::TOP && !keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
            
            
            
            break;
        }
        ret = std::max(ret, IsMineInner(keystore, GetScriptForDestination(PKHash(uint160(vSolutions[0]))), IsMineSigVersion::WITNESS_V0));
        break;
    }
    case TxoutType::PUBKEYHASH:
        keyID = CKeyID(uint160(vSolutions[0]));
        if (!PermitsUncompressed(sigversion)) {
            CPubKey pubkey;
            if (keystore.GetPubKey(keyID, pubkey) && !pubkey.IsCompressed()) {
                return IsMineResult::INVALID;
            }
        }
        if (keystore.HaveKey(keyID)) {
            ret = std::max(ret, IsMineResult::SPENDABLE);
        }
        break;
    case TxoutType::SCRIPTHASH:
    {
        if (sigversion != IsMineSigVersion::TOP) {