This error occurs when Salesforce expects a valid 18-character or 15-character ID format but receives an incorrect or improperly formatted value.
E2120 - ECE_SForceUpdateInsert: We got an error back from SalesForce when trying to update or insert data in SalesForce.
Error returned from SFDC on upsert: [fields: Invoice__c , message: Invoice/Credit Memo: id value of incorrect type: NOT LINKED TO INVOICE , statusCode: MALFORMED_ID ] , Record does not exist in SFDC, Data sent to SFDC: sObjects: [type: Sales_Summary__c , Unique_Key__c: USA#999 , Name: 000678 , Customer__c: 001f400000CyR2FAAV , Posting_Date__c: 2018-10-01T00:00:00.000Z , Document_Type__c: Invoice , Document_No__c: 91E688D36-B , Description__c: Rev adj. , Currency_Code__c: USD , Amount__c: 3.800000 , Salesperson_Name__c: John Doe , Open__c: false , Due_Date__c: 2018-11-15T00:00:00.000Z , Sales_LCY__c: 3.800000 , Date__c: 2018-10-01T00:00:00.000Z , Payment_Discount_Date__c: 2018-10-01T00:00:00.000Z , Invoice__c: NOT LINKED TO INVOICE.
Common causes:
Solution: