### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current behaviour

I randomly encountered this by loading a wallet created from master with an older version. I could trace it down to bd13dc2f46ea10302a928fcf0f53b7aed77ad260 (#26076), but I don't know descriptor wallets enough to understand what's going on (cc @Sjors @achow101).

### Expected behaviour

`bitcoind` starts, or at least tells me to use a later version if #26076 was a breaking change instead of corrupting `wallet.dat`.

### Steps to reproduce

(master, clean chain): 
`createwallet -regtest ""`
(v25.0rc2):
first `bitcoind -regtest` succeeds
then stop and restart the node: The second `bitcoind -regtest` leads to an InitError:
`Error: Error: Unable to expand wallet descriptor from cache`
now, the wallet cannot be loaded by either version.

### Relevant log output

_No response_

### How did you obtain Bitcoin Core

Compiled from source

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

v25.0rc2 / master

### Operating system and version

Ubuntu

### Machine specifications

_No response_
std::set<std::pair<CPubKey, KeyOriginInfo>> ret;
    for (const auto& [_, data] : provider.origins) {
        if (flags & XONLY_KEYS) {
            unsigned char bytes[33];
            BOOST_CHECK_EQUAL(data.first.size(), 33);
            std::copy(data.first.begin(), data.first.end(), bytes);
            bytes[0] = 0x02;
            CPubKey norm_pubkey{bytes};
            KeyOriginInfo norm_origin = data.second;
            std::fill(std::begin(norm_origin.fingerprint), std::end(norm_origin.fingerprint), 0); 
            ret.emplace(norm_pubkey, norm_origin);
        } else {
            ret.insert(data);
        }
    }
    return ret;
}
void DoCheck(std::string prv, std::string pub, const std::string& norm_pub, int flags,