Issue with Field symbols

HI Experts,

I face an issue while using field symbols, kindly help me out. Here <lts_commercial> and <lfs_commercial> is of both same data type, but still I get the error message that the field "Product_guid" is not an component.

field-symbols:

               <lts_commercial> type ANY TABLE,

                <lfs_commercial> type any,

CREATE DATA ref_itab type STANDARD TABLE OF (lc_commercial)

             WITH NON-UNIQUE DEFAULT KEY.

       assign ref_itab->* to <lts_commercial>.

       create data ref_ls like line of <lts_commercial>.

       assign ref_ls->* to <lfs_commercial>.

       ASSIGN <ls_set>-data->* TO <lts_commercial>.

       READ TABLE <lts_commercial> into <lfs_commercial> with KEY product_guid = lt_comp_det-object_guid.

ERROR MESSAGE:

       The specified type has no structure and therefore no component called

       "PRODUCT_GUID". component called "PRODUCT_GUID".