Column Mismatch in Post-processing

[aspeake]

Describe the bug
On the restructure-v3 branch, the post-processing hits an error in the combine_results() method: ValueError: Metadata mismatch found in from_delayed. The error occurs when calling: df = dask.compute(results_df_groups.get_group(upgrade_id))[0]

To Reproduce
Running post-processing with the residential_hpxml wokflow generator
yml: https://github.com/NREL/resstock/blob/run/restructure-v3/project_national/resstock_hpxml_2018.yml

Logs

Postprocessing.out traceback:

Traceback (most recent call last):
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/aspeake/buildstock/buildstockbatch-2/buildstockbatch/eagle.py", line 741, in <module>
    main()
  File "/home/aspeake/buildstock/buildstockbatch-2/buildstockbatch/utils.py", line 98, in run_with_error_capture
    return func(*args, **kwargs)
  File "/home/aspeake/buildstock/buildstockbatch-2/buildstockbatch/eagle.py", line 731, in main
    batch.process_results()
  File "/home/aspeake/buildstock/buildstockbatch-2/buildstockbatch/base.py", line 572, in process_results
    postprocessing.combine_results(fs, self.results_dir, self.cfg, do_timeseries=do_timeseries)
  File "/home/aspeake/buildstock/buildstockbatch-2/buildstockbatch/postprocessing.py", line 315, in combine_results
    df = dask.compute(results_df_groups.get_group(upgrade_id))[0]
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/dask/base.py", line 570, in compute
    results = schedule(dsk, keys, **kwargs)
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/client.py", line 2722, in get
    results = self.gather(packed, asynchronous=asynchronous, direct=direct)
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/client.py", line 1983, in gather
    asynchronous=asynchronous,
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/client.py", line 866, in sync
    self.loop, func, *args, callback_timeout=callback_timeout, **kwargs
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/utils.py", line 327, in sync
    raise exc.with_traceback(tb)
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/utils.py", line 310, in f
    result[0] = yield future
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/tornado/gen.py", line 762, in run
    value = future.result()
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/distributed/client.py", line 1842, in _gather
    raise exception.with_traceback(traceback)
  File "/shared-projects/buildstock/envs/dev_aspeake_2/lib/python3.7/site-packages/dask/dataframe/utils.py", line 408, in check_meta
    "%s" % ((" in `%s`" % funcname if funcname else ""), errmsg)
ValueError: Metadata mismatch found in `from_delayed`.

Partition type: `pandas.core.frame.DataFrame`
+------------------------------------------------------------------+---------+----------+
| Column                                                           | Found   | Expected |
+------------------------------------------------------------------+---------+----------+
| 'ApplyUpgrade.applicable'                                        | float64 | object   |
| 'ApplyUpgrade.upgrade_name'                                      | float64 | object   |
| 'BuildExistingModel.applicable'                                  | object  | bool     |
| 'QOIReport.applicable'                                           | object  | bool     |
| 'ReportSimulationOutput.add_timeseries_dst_column'               | object  | bool     |
| 'ReportSimulationOutput.add_timeseries_utc_column'               | object  | bool     |
| 'ReportSimulationOutput.applicable'                              | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_airflows'             | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_component_loads'      | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_emissions'            | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_end_use_consumptions' | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_fuel_consumptions'    | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_hot_water_uses'       | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_total_loads'          | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_weather'              | object  | bool     |
| 'ReportSimulationOutput.include_timeseries_zone_temperatures'    | object  | bool     |
| 'UpgradeCosts.applicable'                                        | object  | bool     |
+------------------------------------------------------------------+---------+----------+

real	2m19.599s
user	0m1.540s
sys	0m1.258s