Error "Change of field Reference Key & is not possible. Field is not open for input" appears while using the field "Reference&IDByBusinessPartner" via the API Journal Entry - Change (Asynchronous).
The field "Reference&" is not open to input, so the API Journal Entry - Change (Asynchronous) raises the error.
Reference field settings in the SSCUI 102393 - Define Field Status Variants should be checked.
These fields can be found in the field status group YB29, under General Data.
Guidelines for API Journal Entry – Change (Asynchronous) part 6.1 Constraints.
reference, reference field, reference key, Reference2IDByBusinessPartner, API, Journal Entry Change, Asynchronous, sscui, define field status variants, 102393 , KBA , AC-INT , Accounting Interface , Problem