diff --git a/svc/product_series_auto_scheduler.go b/svc/product_series_auto_scheduler.go
index 3fa98f6..7b37060 100644
--- a/svc/product_series_auto_scheduler.go
+++ b/svc/product_series_auto_scheduler.go
@@ -1179,6 +1179,15 @@ func productSeriesResolveDimTokenID(ctx context.Context, pg *sql.DB, column stri
 	var id int64
 	err := pg.QueryRowContext(ctx, `SELECT dim_id FROM mk_dim_token_map WHERE dim_column=$1 AND token=$2`, column, tok).Scan(&id)
 	if err == nil {
+		// mk_dim_token_map can become polluted by heuristic inference/persistence (especially for dimval1).
+		// If we can cross-check against item-scoped images, prefer the item-specific inference to avoid
+		// conflating different tokens onto the same dim_id.
+		if column == "dimval1" && mmitemID > 0 {
+			if inferred, ok := productSeriesInferDimIDFromImages(pg, mmitemID, column, tok); ok && inferred > 0 && inferred != id {
+				log.Printf("[DimTokenConflict] column=dimval1 token=%s mmitem_id=%d mapped=%d inferred=%d", tok, mmitemID, id, inferred)
+				return inferred, true, nil
+			}
+		}
 		return id, id > 0, nil
 	}
 	if err != sql.ErrNoRows {
@@ -1186,12 +1195,20 @@ func productSeriesResolveDimTokenID(ctx context.Context, pg *sql.DB, column stri
 	}
 
 	// Fallback: infer from dfblob filenames.
-	// For dimval3, prefer token map as the source of truth when present; use image inference only when missing.
-	if column == "dimval3" && mmitemID > 0 {
-		if inferred, ok := productSeriesInferDimIDFromImages(pg, mmitemID, column, tok); ok {
+	// Prefer item-scoped inference when we have mmitem_id. We intentionally avoid persisting these
+	// inferred rows into mk_dim_token_map to prevent global pollution.
+	if mmitemID > 0 {
+		if inferred, ok := productSeriesInferDimIDFromImages(pg, mmitemID, column, tok); ok && inferred > 0 {
 			return inferred, true, nil
 		}
 	}
+
+	// As a last resort, do a global inference. This is intentionally disabled for dimval1 because it is
+	// too easy to mis-infer and conflate tokens across the whole catalog.
+	if column == "dimval1" {
+		return 0, false, nil
+	}
+
 	v := productSeriesResolveDimvalFromFileNameToken(pg, column, tok, 0)
 	if v == "" {
 		return 0, false, nil
@@ -1200,15 +1217,6 @@ func productSeriesResolveDimTokenID(ctx context.Context, pg *sql.DB, column stri
 	if perr != nil || parsed <= 0 {
 		return 0, false, nil
 	}
-	if column == "dimval1" {
-		// Persist only for dimval1 where tokens are globally stable.
-		_, _ = pg.ExecContext(ctx, `
-INSERT INTO mk_dim_token_map (dim_column, token, dim_id, updated_at)
-VALUES ($1,$2,$3,now())
-ON CONFLICT (dim_column, token)
-DO UPDATE SET dim_id = EXCLUDED.dim_id, updated_at = EXCLUDED.updated_at
-`, column, tok, parsed)
-	}
 	return parsed, true, nil
 }