The 16.20 release is not compatible with 15.10.10.00 or earlier releases. The 16.20 installer will provide the option to remove any pre-15.10.10.00 release found before installing 16.20 or cancel the install.
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Click Install.
- Click Continue to uninstall the previous version and continue with the 16.20 install or Cancel to exit the installation. Information about the packages removed can be found in the log file: /tmp/TTUInstall16.20.log.