You are getting any unexpected error when saving a record with a custom employee status or custom event.
SAP SuccessFactors Employee Central (EC) - All Versions
You can't create custom events or employee status.
These two picklists are standard and you should never create custom values for them since this will cause several unexpected behaviors in several parts of EC where employee data is used such as Imports, TIM, Job history, and so on.
If you want you can relabel the standard employee-status and event picklist.
2093210 - Error – “[Internal System Error encountered while importing record]” when importing Job Info data file - Employee Central
2203207 - Application Error accessing Job or Employment Information - Employee Status Picklist Issue
custom event picklist custom employee-status picklist , KBA , LOD-SF-EC-TIM , Time-Off , Problem