### 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_
{
    std::vector<std::vector<unsigned char>> solutions;
    return Solver(dest, solutions) == TxoutType::PUBKEY &&
        (pubKeyOut = CPubKey(solutions[0])).IsFullyValid();
}
bool LegacyScriptPubKeyMan::RemoveWatchOnly(const CScript &dest)
{
    {
        LOCK(cs_KeyStore);
        setWatchOnly.erase(dest);
        CPubKey pubKey;
        if (ExtractPubKey(dest, pubKey)) {
            mapWatchKeys.erase(pubKey.GetID());
        }
        
        
    }
    if (!HaveWatchOnly())
        NotifyWatchonlyChanged(false);
    if (!WalletBatch(m_storage.GetDatabase()).EraseWatchOnly(dest))
        return false;
    return true;
}
bool LegacyScriptPubKeyMan::LoadWatchOnly(const CScript &dest)
{
    return AddWatchOnlyInMem(dest);
}
bool LegacyScriptPubKeyMan::AddWatchOnlyInMem(const CScript &dest)