Unable to update to date in talent rating page

Summary:

We are trying to update the from and to date of the performance rating which is created by performance document in talent rating section. We are getting the source system ID using the below query, Now the system is creating one more entry with same source system ID instead of updating existing record. The business users want to update the rating as the rating is for the period (Jan 21 – Dec 21) and they are completing the document 17/Sep/2024, in this case the from date is update as 17/SEP/2024 which is a wrong data to the employees, So we