After disabling the 'Merge' option from the lookup(Budget Submit Options), Classic works but THE option is still available in the Modern.
STEPS TO REPRODUCE:
1.Go to Administration > Data Administration > Lookups > Budget Submit Options
Inactivate Merge option
2. Go to Administration > Studio > Objects
Cost Plan > Attributes > select attribute(Budget Submit Options)
only Replace option is available.
3.In Classic, create a cost plan and submit it for Approval.
Only Replace option is available.
4. In Modern, go to same project > cost plan and submit for approval
Expected: Only Replace option should be available.
Actual: Both Merge and Replace are available.
The Modern should have the same functionality as the Classic.
Release : 16.1.1
This is reported as DE69354 is resolved in 16.1.3