An error occurred while executing a save: Expression evaluation error: The save target must be a local variable that does not refresh on every evaluation or on an interval, a process variable, or a node input

title as above,

code as:

a!save(target:ri!userinputsheet.KONE_user_name,value:fv!item.KONE_user_name),
                a!save(target:ri!userinputsheet.FIRST_NAME,value:fv!item.FIRST_NAME),
                a!save(target:ri!userinputsheet.LAST_NAME,value:fv!item.LAST_NAME),
                a!save(target:ri!userinputsheet.Email,value:fv!item.Email),
                a!save(target:ri!userinputsheet.Role,value:fv!item.Role),
                a!save(target:ri!userinputsheet.Branch,value:fv!item.Branch),
                a!save(target:ri!userinputsheet.Region,value:fv!item.Region),
                a!save(target:ri!userinputsheet.Manager_role,value:fv!item.Manager_role),
                a!save(target:ri!userinputsheet.Telephone_number,value:fv!item.Telephone_number),
                a!save(target:ri!userinputsheet.CE_LEVEL,value:fv!item.CE_LEVEL),
                a!save(target:ri!userinputsheet.Active,value:fv!item.Active),
                a!save(target:ri!userinputsheet.Language,value:fv!item.Language),
                a!save(target:ri!userinputsheet.Exceptional_case_library_view_right,value:fv!item.Exceptional_case_library_view_right),
                a!save(target:ri!userinputsheet.updateTime,value:now()),
                a!writeToMultipleDataStoreEntities(
                  valuesToStore: {
                    a!entityData(entity: cons!KONE_Development_userinputsheet_Constant, data: ri!userinputsheet),
                    a!entityData(entity: cons!KONE_Development_userrole_Constant, data: ri!userrole)
                  }
                )

what is the problem?