Due to changes in the system's structure the configuration file to set the 'system-log' settings will be modified during the post update process. The file
resources/logback.xml will be replaced by the a new configuration file.
If the file resources/logback.xml has been manually modifed, it is advised to make a backup copy of it before starting the update process so its configuration can be applied to the new logback.xml after the update has completed.
Due to structural changes in the language packages, all supported server language packages will be updated automatically, customized language packages will be removed during the update process (a backup is done before). If more language packages are needed, it is required to download and install them again.
In case your language packages have been modified, the attached delta-file delta_english_lp_4.6.1_to_4.7.0.txt can help you to locate the changes in this update and re-apply the modifications.