diff --git a/src/main/java/com/ffii/fpsms/modules/master/service/ledgerfix/StockLedgerFixExportService.kt b/src/main/java/com/ffii/fpsms/modules/master/service/ledgerfix/StockLedgerFixExportService.kt
index 2950e8fd..370b4776 100644
--- a/src/main/java/com/ffii/fpsms/modules/master/service/ledgerfix/StockLedgerFixExportService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/master/service/ledgerfix/StockLedgerFixExportService.kt
@@ -113,7 +113,7 @@ open class StockLedgerFixExportService(
             writer.write("-- stock-ledger-fix patch\n")
             writer.write("-- from $from inclusive to ${toExclusive.minusDays(1)} inclusive (date < $toExclusive)\n")
             writer.write("-- parts=${parts.joinToString(",")}\n")
-            writer.write("-- apply order: 1.0 inventory → 2.1 delete ledger + stock_out lot → ledger(+2.3) UPDATE → 2.7 SIL/SOL/adjustment record then ADJ INSERT → 2.6 stock_lot_day\n")
+            writer.write("-- apply order: 1.0 lot outQty NULL→0 then inventory → 2.1 delete ledger + stock_out lot → ledger(+2.3) UPDATE → 2.7a lot inQty + SIL/SOL/adjustment record then ADJ INSERT → 2.6 stock_lot_day\n")
             writer.write("-- INNER JOIN id: target rows without matching id are skipped on UPDATE\n")
             if (want23 && !want10) {
                 writer.write("-- WARN: 2.3 without 1.0 — new inventory ids may be missing on target; prefer include 1.0\n")
@@ -153,6 +153,9 @@ open class StockLedgerFixExportService(
     }
 
     private fun writeExportInventory10(writer: BufferedWriter, jdbc: NamedParameterJdbcTemplate) {
+        writer.write("-- === 1.0 lot line outQty NULL → 0 (before inventory; trigger may run, next block overwrites buckets) ===\n")
+        writer.write(StockLedgerFixInventorySql.ZERO_NULL_OUT_QTY_SQL.trim())
+        writer.write(";\n\n")
         writer.write("-- === 1.0 inventory (INSERT with fixed id + UPDATE qty/status) ===\n")
         var batch = 0
         jdbc.query(