Not able to zero-out safety stock quantity in material master using BAPI '/AFS/BAPI_MATERIAL_SAVEDATA'

Hi,

I have a requirement to update AFS MRP safety stock quantity in material master. For this purpose i am using BAPI '/AFS/BAPI_MATERIAL_SAVEDATA'.

This BAPI is able to update successfully with any quantity except zero quantity (0). Not sure why i am not able to update safety stock quantity to zero.

Is there anything else that i am missing out? Please advice.

lwa_headdata-material = 12345678.

lwa_headdata-afs_mrp_view = 'X'.

lwa_plantdata-plant = MY01.

lwa_plantdata-coverage_strtgy = CVS01.

lwa_plantdatax-plant = MY01.

lwa_plantdatax-coverage_strtgy = 'X'.

lwa_sku_plantdata_mrp-plant = MY01.

lwa_sku_plantdata_mrp-safety_stk = 0.

lwa_sku_plantdata_mrp-grid_value = 28.

lwa_sku_plantdata_mrp-stock_category = 1AA.

APPEND lwa_sku_plantdata_mrp TO lt_sku_plantdata_mrp.

* Call BAPI to update safety stock in material master

CALL FUNCTION '/AFS/BAPI_MATERIAL_SAVEDATA'

EXPORTING

headdata = lwa_headdata

plantdata = lwa_plantdata

plantdatax = lwa_plantdatax

IMPORTING

return = lwa_return

TABLES

sku_plantdata_mrp = lt_sku_plantdata_mrp.