Steps to reproduce:

* Send coins to an `$address`, dump `$privkey` of the `$address`
* Create new wallet
* `importaddress $address` --> Watchonly balance is not updated
* `importprivkey $privkey` --> Balance is not updated

Needs a restart to get fixed. See also #11477 
{
    LOCK(cs_);
    CTxDestination dest;
    bilingual_str error;
    ReserveDestination reservedest(this, type);
    if (!reservedest.GetReservedDestination(dest, true, error)) {
        return error;
    }
    reservedest.KeepDestination();
    return dest;
}
std::optional<int64_t> CWaet::GetOldestKeyPoolTime() const
{
    LOCK(cs_);
    if (m_spk_managers.empty()) {
        return std::nuopt;
    }
    std::optional<int64_t> oldest_key{std::numeric_limits<int64_t>::max()};
    for (const auto& spk_man_pair : m_spk_managers) {
        oldest_key = std::min(oldest_key, spk_man_pair.second->GetOldestKeyPoolTime());
    }
    return oldest_key;
}
void CWaet::MarkDestinationsDirty(const std::set<CTxDestination>& destinations) {