### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current behaviour

crash

### Expected behaviour

no crash

### Steps to reproduce

* Compile 79e8247ddb166f9b980f40249b7372a502402a4d
* Type `migratewallet`

### Relevant log output

```
wallet/scriptpubkeyman.cpp:1915: std::optional<MigrationData> wallet::LegacyScriptPubKeyMan::MigrateToDescriptor(): Assertion `IsMine(desc_spk) != ISMINE_NO' failed.
Aborted (core dumped)
```


### How did you obtain Bitcoin Core

Compiled from source

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

current master

### Operating system and version

Linux

### Machine specifications

_No response_
bool GetKeyFromPool(CPubKey &key, const OutputType type);
    /**
     * Reserves a key from the keypool and sets nIndex to its index
     *
     * @param[out] nIndex the index of the key in keypool
     * @param[out] keypool the keypool the key was drawn from, which could be the
     *     the pre-split pool if present, or the internal or external pool
     * @param fRequestedInternal true if the caller would like the key drawn
     *     from the internal keypool, false if external is preferred
     *
     * @return true if succeeded, false if failed due to empty keypool
     * @throws std::runtime_error if keypool read failed, key was invalid,
     *     was not found in the wallet, or was misclassified in the internal
     *     or external keypool
     */
    bool ReserveKeyFromKeyPool(int64_t& nIndex, CKeyPool& keypool, bool fRequestedInternal);
    /**
     * Like TopUp() but adds keys for inactive HD chains.
     * Ensures that there are at least -keypool number of keys derived after the given index.
     *
     * @param seed_id the CKeyID for the HD seed.
     * @param index the index to start generating keys from
     * @param internal whether the internal chain should be used. true for internal chain, false for external chain.
     *
     * @return true if seed was found and keys were derived. false if unable to derive seeds
     */
    bool TopUpInactiveHDChain(const CKeyID seed_id, int64_t index, bool internal);
    bool TopUpChain(CHDChain& chain, unsigned int size);
public:
    LegacyScriptPubKeyMan(WalletStorage& storage, int64_t keypool_size) : ScriptPubKeyMan(storage), m_keypool_size(keypool_size) {}