In process model getting error at update CDT node

Question

Hello All, 
 
 While updating CDT, got below error 
 
 An error occurred while trying to write to the entity "SEC_IPOMarginMapping" [id=a6da64a0-8b67-4c95-9eee-0073b364a76c@705410, type=SEC_IPO_Margin_Mapping_List (id=9412)] (data store: SEC Securities DS). Details: javax.persistence.EntityExistsException: A different object with the same identifier value was already associated with the session : [SECIPOMarginMappingListDT22360#2] Data: TypedValue[it=9413, v={array of values}. 
 
 The Unique identifier column is set to auto increment. 
 Please advise. 
 Regards.

Shubham Aware · Answer

You're creating a new record with an Id that already exists in the database instead of updating the existing one. When updating data, don't create a new record with an existing Id. Instead, fetch the existing record from the database, change its values, then save it back.