falsche Zuweisung zu dynamischer Spalte

Code: Alles auswählen.

    ls_component-name = 'BISMT'.
    ls_component-type ?= cl_abap_datadescr=>describe_by_data( <fs_article>-bismt ).
    APPEND ls_component TO gt_component.

    CLEAR : ls_component-name, ls_component-type.

    LOOP AT it_article ASSIGNING <fs_article>.
      READ TABLE gt_component INTO ls_component WITH KEY name = <fs_article>-werks.
      IF sy-subrc NE 0.
        ls_component-name = <fs_article>-werks.
        ls_component-type ?= cl_abap_datadescr=>describe_by_data( <fs_article>-mmsta ).
        APPEND ls_component TO gt_component.
        CLEAR : ls_component, str_mmstd, str_werks .
        IF so_date1 IS NOT INITIAL.
          str_werks = <fs_article>-werks.
          CONCATENATE  'MMSTD' '_' str_werks INTO str_mmstd.
          ls_component-name = str_mmstd.
          ls_component-type ?= cl_abap_datadescr=>describe_by_data( <fs_article>-mmstd ).
          APPEND ls_component TO gt_component.
        ENDIF.
      ENDIF.
      CLEAR : ls_component, str_mmstd, str_werks .
    ENDLOOP.