3138898 - Dump ITAB_DUPLICATE_KEY is displayed when executing ATP check

The dump  ITAB_DUPLICATE_KEY happens when an ATP check is executed - e.g. CO09 or VA01/VA02 or when doing delivery creation.

e.g. CO09:

Entering a material/plant combination in transaction CO09, the following dump is raised.

Details about dump:

Category               ABAP programming error
Runtime Errors         ITAB_DUPLICATE_KEY
ABAP Program           SAPLATPC

...

138 CLASS lcl_check_apo IMPLEMENTATION.
139   METHOD constructor.
140     super->constructor( ).
>>>     mt_desmat = it_desmat.
142     DELETE mt_desmat WHERE logsys NE iv_logsys.
143
144     ms_atpapo-logsys = iv_logsys.
145     PERFORM cif_ndi_system_release
146           USING
147               ms_atpapo-logsys
148           CHANGING
149               ms_atpapo-aporel
150               ms_atpapo-apointdate.
151   ENDMETHOD.

...

7  METHOD       SAPLATPC                            LATPCP03                              141
   LCL_CHECK_APO=>CONSTRUCTOR
6  FORM         SAPLATPC                            LATPCFF3                               68
   FILL_CONTROLLER_OBJECTS
5  FUNCTION     SAPLATPC                            LATPCU20                               58
   AVAILABILITY_CHECK_S4
4  FORM         SAPLATP4                            LATP4FA0                              147
   ATP_CHECK

• SAP S/4 Hana release
• ATP check

 ATP; Availability Overview; PIC01 004; PIC01004; Integration model; MARC; RFC;  , KBA , SCM-APO-ATP , Global Available-to-Promise , CA-ATP , Available to Promise (ATP) , SCM-APO-INT-SLS , Sales , Problem