This is similar to #21352, #20270, #18831, #18161, but they have all been closed/fixed, and this is happening again on master as of the [last CI run](https://github.com/bitcoin/bitcoin/runs/2928080250):
```bash
122/210 - feature_backwards_compatibility.py --descriptors failed, Duration: 68 s
stdout:
2021-06-28T03:28:48.903000Z TestFramework (INFO): Initializing test directory /tmp/cirrus-build/ci/scratch/test_runner/test_runner_₿_🏃_20210628_031620/feature_backwards_compatibility_97
2021-06-28T03:28:52.381000Z TestFramework (INFO): Test wallet backwards compatibility...
2021-06-28T03:29:56.399000Z TestFramework (ERROR): JSONRPC error
Traceback (most recent call last):
  File "/tmp/cirrus-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/test_framework.py", line 128, in main
    self.run_test()
  File "/tmp/cirrus-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/feature_backwards_compatibility.py", line 110, in run_test
    self.nodes[1].abandontransaction(tx3_id)
  File "/tmp/cirrus-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/coverage.py", line 47, in __call__
    return_val = self.auth_service_proxy_instance.__call__(*args, **kwargs)
  File "/tmp/cirrus-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/test_framework/authproxy.py", line 146, in __call__
    raise JSONRPCException(response['error'], status)
test_framework.authproxy.JSONRPCException: Transaction not eligible for abandonment (-5)
2021-06-28T03:29:56.453000Z TestFramework (INFO): Stopping nodes
2021-06-28T03:29:56.723000Z TestFramework (WARNING): Not cleaning up dir /tmp/cirrus-build/ci/scratch/test_runner/test_runner_₿_🏃_20210628_031620/feature_backwards_compatibility_97
2021-06-28T03:29:56.724000Z TestFramework (ERROR): Test failed. Test logging available at /tmp/cirrus-build/ci/scratch/test_runner/test_runner_₿_🏃_20210628_031620/feature_backwards_compatibility_97/test_framework.log
2021-06-28T03:29:56.724000Z TestFramework (ERROR): 
2021-06-28T03:29:56.725000Z TestFramework (ERROR): Hint: Call /tmp/cirrus-build/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/test/functional/combine_logs.py '/tmp/cirrus-build/ci/scratch/test_runner/test_runner_₿_🏃_20210628_031620/feature_backwards_compatibility_97' to consolidate all logs
2021-06-28T03:29:56.725000Z TestFramework (ERROR): 
2021-06-28T03:29:56.725000Z TestFramework (ERROR): If this failure happened unexpectedly or intermittently, please file a bug and provide a link or upload of the combined log.
2021-06-28T03:29:56.725000Z TestFramework (ERROR): https://github.com/bitcoin/bitcoin/issues
2021-06-28T03:29:56.725000Z TestFramework (ERROR): 
```


if (value.isStr() && value.get_str() == waet_name) return true;
    }
    setting_value.push_back(waet_name);
    return chain.updateRwSetting("waet", setting_value);
}
bool RemoveWaetSetting(interfaces::Chain& chain, const std::string& waet_name)
{
    util::SettingsValue setting_value = chain.getRwSetting("waet");
    if (!setting_value.isArray()) return true;
    util::SettingsValue new_value(util::SettingsValue::VARR);
    const util::SettingsValue& value : setting_value.getValues()) {
        if (!value.isStr() || value.get_str() != waet_name) new_value.push_back(value);
    }
    if (new_value.size() == setting_value.size()) return true;
    return chain.updateRwSetting("waet", new_value);
}
static void UpdateWaetSetting(interfaces::Chain& chain,
                                const std::string& waet_name,
                                std::optional<bool> load_on_startup,
                                std::vector<bilingual_str>& warnings)
{
    if (!load_on_startup) return;
    if (load_on_startup.value() && !AddWaetSetting(chain, waet_name)) {
        warnings.emplace_back(Untranslated("Waet load on startup setting could not be updated, so waet may not be loaded next node startup."));
    } else if (!load_on_startup.value() && !RemoveWaetSetting(chain, waet_name)) {
        warnings.emplace_back(Untranslated("Waet load on startup setting could not be updated, so waet may sti be loaded next node startup."));
    }
}
bool AddWaet(const std::shared_ptr<CWaet>& waet)