Upload an .xlsx with exactly these three columns (header row required):
| BOX | jewel code | MSP |
|---|---|---|
| BOX-A1 | 24P00024 | 950000 |
| BOX-A1 | 24P00025 | 480000 |
| BOX-B2 | 23P00319 |
Each listed box is fully rebuilt from the sheet (its current contents are replaced). Boxes and jewels not in the sheet are left untouched. A blank MSP cell leaves that jewel's existing MSP unchanged. New boxes are created with a 500g placeholder weight. Unknown jewel codes and duplicates are skipped and reported.
Always Preview first — Preview writes nothing. Commit applies everything in one transaction.