Create new project Import Government Updates 2019.dmn Import Traffic Violation.dmn Try to create a test scenario for Traffic Violation.dmn Once Test Scenario editor is open, add and instance column for 'government.updates.2019.Decrease Points' It will create column as 'expression </>' property Now try to change the column to its real 'value:number' property, you will be not able. The change should be done by pressing blue button in the bottom [1] . [1]