diff --git a/svc/product_series_auto_scheduler.go b/svc/product_series_auto_scheduler.go
index 9775d44..f077d75 100644
--- a/svc/product_series_auto_scheduler.go
+++ b/svc/product_series_auto_scheduler.go
@@ -676,6 +676,19 @@ VALUES ($1, $2, $3, $4)
 	if err := tx.Commit(); err != nil {
 		return 0, 0, err
 	}
+	if productSeriesDebugMatch(v) {
+		ids := make([]string, 0, len(selected))
+		for _, r := range selected {
+			ids = append(ids, fmt.Sprintf("%d", r.SeriesID))
+		}
+		log.Printf("[ProductSeriesDebug] wrote=%d product=%s color=%s dim3=%s series_ids=%s",
+			len(selected),
+			strings.TrimSpace(v.ProductCode),
+			strings.TrimSpace(v.ColorCode),
+			strings.TrimSpace(v.Dim3Code),
+			strings.Join(ids, ","),
+		)
+	}
 	return len(selected), 0, nil
 }