Opening file in Collabora Online create always a new version. Save button is useless

I’ve installed Collabora Online using deb package. Collabora Online is running, but every time I open the file a new version is created. This make versioning no-sense and create a mess. Is there any way to change this behavior? The best and the most logic approach will be that the file would be updated and a new version would happen only when the button save is pressed. Any suggestion?