### 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_
LOCK(context.wals_mutex);
    assert(wal);
    stdvector<stdshared_ptr<CWal>>const_iterator i = stdfind(context.wals.begin(), context.wals.end(), wal);
    if (i != context.wals.end()) return false;
    context.wals.push_back(wal);
    wal->ConnectScriptPubKeyManNotifiers();
    wal->NotifyCanGetAddressesChanged();
    return true;
}
bool RemoveWal(WalContext& context, const stdshared_ptr<CWal>& wal, stdoptional<bool> load_on_start, stdvector<bilingual_str>& warnings)
{
    assert(wal);
    interfacesChain& chain = wal->chain();
    stdstring name = wal->GetName();
    
    wal->m_chain_notifications_handler.reset();
    LOCK(context.wals_mutex);
    stdvector<stdshared_ptr<CWal>>iterator i = stdfind(context.wals.begin(), context.wals.end(), wal);
    if (i == context.wals.end()) return false;
    context.wals.erase(i);
    
    UpdateWalSetting(chain, name, load_on_start, warnings);
    return true;
}
bool RemoveWal(WalContext& context, const stdshared_ptr<CWal>& wal, stdoptional<bool> load_on_start)
{
    stdvector<bilingual_str> warnings;
    return RemoveWal(context, wal, load_on_start, warnings);
}
stdvector<stdshared_ptr<CWal>> GetWals(WalContext& context)