3357598 - Error Change Layout in Tx KO88

ITAB_DUPLICATE_KEY dump when changing layout in Transaction KO88

Category               ABAP programming error
Runtime Errors         ITAB_DUPLICATE_KEY
ABAP Program           CL_ALV_VARIANT================CP
Application Component  BC-SRV-ALV
Date and Time          19.07.2023 11:12:43 (ESTNO)

Information on where terminated
    The termination occurred in ABAP program or include
     "CL_ALV_VARIANT================CP", in "IF_ALV_GUI_VARIANT~SET". The
    main program was "SAPLKO71".

    In the source code, the termination point is in line 49 of include
     "CL_ALV_VARIANT================CM01J".
    include "CL_ALV_VARIANT================CM01J".

    Active Calls/Events

No.   Ty.          Program                             Include                             Line
      Name

   20 METHOD       CL_ALV_VARIANT================CP    CL_ALV_VARIANT================CM01J    49
      CL_ALV_VARIANT=>IF_ALV_GUI_VARIANT~SET
   19 METHOD       CL_ALV_CML_CONFIGURATION======CP    CL_ALV_CML_CONFIGURATION======CM01W    11
      CL_ALV_CML_CONFIGURATION=>SET_DATA_TO_GRID

SAP Release 757 SP 0000
SAP Release 789 To SAPK-78904INSAPBASIS 

ALV, ITAB_DUPLICATE_KEY, KO88  , KBA , BC-SRV-ALV , SAP List Viewer , Problem