Due to a problem in the Intel® Quartus® Prime Pro Edition software version 19.3, you may see duplicated settings showed in the Advanced Synthesis and Fitter Settings pane. This problem occurs when an incorrect QSF settings is read by the Intel® Quartus® Prime Pro edition software for designs targeting Intel® Stratix® 10 devices.
To work around this problem, delete the project database and fix the incorrect QSF assignment.
This problem is fixed starting with the Intel® Quartus® Prime Pro Edition software version 20.3.