How to get conversion information after extracting or stacking?

[myrthel]

('python=3.10.5 (tags/v3.10.5:f377153, Jun 6 2022, 16:14:13) [MSC v.1929 64 ' 'bit (AMD64)]') 'os=Windows-10-10.0.19045-SP0' 'numpy=1.23.1' 'asammdf=7.3.14'

Code

MDF version

4.10

Code snippet

mdf = MDF(path_mdf_file)
databases = readConfig(path_ini_file)
  mdf_extracted = mdf.extract_bus_logging(
      database_files=databases,
      version=None,
      prefix="",
      progress=None,
  )
stacked = MDF.stack([mdf,mdf_extracted])
groups = mdf_extracted.groups
conversions = []
for group in groups:
    channels = group.channels
    for channel in channels:
        conversions.append(channel.conversion)
        idx_channel+=1
    idx_group+=1

Traceback

Description

So I was trying to get the conversions of all channels from the mdf file. This is working with the origin mdf object from first line. Unfortunately though the objects "stacked" and "mdf_extracted" do not contain the information of conversion anymore. The content is None. Is there a way, to retrieve this information somehow, also through functions "stack" and "extract_bus_logging" as well? Thank you.