tcode VL32N

Hi,

When i execute tcode VL32N - put inbound delivery number - Select pack - put packing material "pack_box" - enter some handling unit .. i get below errors.

When : handling unit - 0 - error "Handling unit 0 already in existence"

When : handling unit - 1 - error "The check digit of SSCC 1 is incorrect. 0 is correct"

When : handling unit - 9 - error "The check digit of SSCC 9 is incorrect. 0 is correct"

When : handling unit - 654 - error "The check digit of SSCC 654 is incorrect. 9 is correct"

Please help to remove these errors.

Regards,