A pre-existing data constraint such as the one below is not being enforced when Employee clicks 'Reopen Ticket' button.
Type: Update
Table: Call_Req
constraint: status <> 'CL'
This is a known concern in which the Employee interface functionality bypasses the Data Partition check on the Update for Call_Req.
To workaround this, create a new DP for the Employee based role which will be:
Type: Pre-Update
Table: Call_Req
constraint: status <> 'CL'
The Pre-Update Data Partition checks if the conditions are permitted for an update to be attempted. The Employee interface code does respect the Pre-Update Data Partition and will not allow the ticket to be edited and thus prevents a reopen as a result.