3690414 - Time Sheet is not admissible in the period directly after the switch from legacy week to monthly approval period

The issue occurs when a user was initially a weekly time recorder (legacy week), then their time sheet approval period is changed to a monthly one.
In this situation, the timesheet period immediately after the switch is not admissible, even though it should be. 

• SAP SuccessFactors Employee Central - Time Sheet
• SAP SuccessFactors Time Tracking

This is a Known Error.

The fix for this issue is planned to be deployed with the patch 2511p9 on 16-Dec-25 in Preview and on 18-Dec in Production.
For patch timelines, please review SAP SuccessFactors Patches Knowledge Base.

Workaround:
No workaround is available.

time recording, admissibility rule, timesheet submission, monthly timesheet, flexible periods, error, KI2H2025, TIM-54931, PTCH-48644, 2511p9 , KBA , LOD-SF-EC-TMS , Time Sheet , Known Error