### 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_
{
    FlatSigningProvider keys_priv, keys_pub;
    std::string error;
    auto parse_priv = Parse(prv, keys_priv, error);
    auto parse_pub = Parse(pub, keys_pub, error);
    BOOST_CHECK_MESSAGE(!parse_priv, prv);
    BOOST_CHECK_MESSAGE(!parse_pub, pub);
    BOOST_CHECK_EQUAL(error, expected_error);
}
void CheckInferRaw(const CScript& script)
{
    FlatSigningProvider dummy_provider;
    std::unique_ptr<Descriptor> desc = InferDescriptor(script, dummy_provider);
    BOOST_CHECK(desc->ToString().rfind("raw(", 0) == 0);
}
constexpr int DEFAULT = 0;
constexpr int RANGE = 1; 
constexpr int HARDENED = 2; 
constexpr int UNSOLVABLE = 4; 
constexpr int SIGNABLE = 8; 
constexpr int DERIVE_HARDENED = 16; 
constexpr int MIXED_PUBKEYS = 32;
constexpr int XONLY_KEYS = 64; 
constexpr int MISSING_PRIVKEYS = 128; 
constexpr int SIGNABLE_FAILS = 256; 
bool EqualDescriptor(std::string a, std::string b)