diff --git a/svc/queries/order_write.go b/svc/queries/order_write.go
index 1657c39..fbd7b53 100644
--- a/svc/queries/order_write.go
+++ b/svc/queries/order_write.go
@@ -485,6 +485,54 @@ func normalizeDim1Token(s string) string {
 	return s
 }
 
+func variantCacheKey(item, color, dim2 string) string {
+	return item + "||" + color + "||" + dim2
+}
+
+func loadVariantDim1SetTx(tx *sql.Tx, item, color, dim2 string) (map[string]struct{}, error) {
+	rows, err := tx.Query(`
+        SELECT ISNULL(LTRIM(RTRIM(V.ItemDim1Code)),'') AS ItemDim1Code
+        FROM BAGGI_V3.dbo.prItemVariant V WITH (NOLOCK)
+        WHERE ISNULL(LTRIM(RTRIM(V.ItemCode)),'') = @p1
+          AND (
+                (
+                  ISNULL(LTRIM(RTRIM(V.ColorCode)),'') = @p2
+                  AND (
+                       ISNULL(LTRIM(RTRIM(@p3)),'') = ''
+                       OR ISNULL(LTRIM(RTRIM(V.ItemDim2Code)),'') = @p3
+                  )
+                )
+                OR (
+                  ISNULL(LTRIM(RTRIM(@p3)),'') = ''
+                  AND ISNULL(LTRIM(RTRIM(V.ItemDim2Code)),'') = @p2
+                )
+              )
+    `, item, color, dim2)
+	if err != nil {
+		return nil, fmt.Errorf("variant set query hatası: %w", err)
+	}
+	defer rows.Close()
+
+	set := make(map[string]struct{})
+	for rows.Next() {
+		var raw string
+		if err := rows.Scan(&raw); err != nil {
+			return nil, fmt.Errorf("variant set scan hatası: %w", err)
+		}
+		norm := normalizeDim1Token(raw)
+		if norm != "" {
+			set[norm] = struct{}{}
+		}
+		if num := normalizeNumericToken(norm); num != "" {
+			set["#NUM:"+num] = struct{}{}
+		}
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("variant set rows hatası: %w", err)
+	}
+	return set, nil
+}
+
 // =======================================================
 // AKSBIR DETECTION
 // =======================================================
@@ -495,6 +543,10 @@ func normalizeDim1Token(s string) string {
 
 // Variant check: ItemCode + ColorCode + Dim1 + Dim2
 func ValidateItemVariant(tx *sql.Tx, ln models.OrderDetail) error {
+	return ValidateItemVariantCached(tx, ln, nil)
+}
+
+func ValidateItemVariantCached(tx *sql.Tx, ln models.OrderDetail, cache map[string]map[string]struct{}) error {
 	fmt.Printf(
 		"🧪 VARIANT GUARD INPUT | ClientKey=%s Item=%q Color=%q Dim1=%q Dim2=%q Dim3=%q Qty1=%v\n",
 		safeNS(ln.ClientKey),
@@ -527,56 +579,42 @@ func ValidateItemVariant(tx *sql.Tx, ln models.OrderDetail) error {
 	dim1Norm := normalizeDim1Token(dim1)
 	dim1Numeric := normalizeNumericToken(dim1Norm)
 
+	fmt.Printf(
+		"🧪 VARIANT NORMALIZED | Item=%q Color=%q Dim1=%q Dim2=%q\n",
+		item, color, dim1Norm, dim2,
+	)
+
 	if item == "" {
-		return fmt.Errorf(
-			"ItemCode boş olamaz (ClientKey=%s)",
-			safeNS(ln.ClientKey),
-		)
-		fmt.Printf(
-			"🧪 VARIANT NORMALIZED | Item=%q Color=%q Dim1=%q Dim2=%q\n",
-			item, color, dim1, dim2,
-		)
-
+		return &models.ValidationError{
+			Code:      "INVALID_ITEM_VARIANT",
+			Message:   "Tanımsız ürün kombinasyonu",
+			ClientKey: safeNS(ln.ClientKey),
+			ItemCode:  item,
+			ColorCode: color,
+			Dim1:      dim1,
+			Dim2:      dim2,
+		}
 	}
 
-	var exists int
-	err := tx.QueryRow(`
-        SELECT CASE WHEN EXISTS (
-            SELECT 1
-            FROM BAGGI_V3.dbo.prItemVariant V WITH (NOLOCK)
-            CROSS APPLY (
-              SELECT UPPER(REPLACE(REPLACE(REPLACE(ISNULL(LTRIM(RTRIM(V.ItemDim1Code)),'') ,' ', ''), 'YAS', ''), 'Y', '')) AS Dim1Norm
-            ) X
-            WHERE ISNULL(LTRIM(RTRIM(V.ItemCode)),'')     = @p1
-              AND (
-                    (
-                      ISNULL(LTRIM(RTRIM(V.ColorCode)),'') = @p2
-                      AND (
-                           ISNULL(LTRIM(RTRIM(@p4)),'') = ''
-                           OR ISNULL(LTRIM(RTRIM(V.ItemDim2Code)),'') = @p4
-                      )
-                    )
-                    OR (
-                      ISNULL(LTRIM(RTRIM(@p4)),'') = ''
-                      AND ISNULL(LTRIM(RTRIM(V.ItemDim2Code)),'') = @p2
-                    )
-                  )
-              AND (
-                    X.Dim1Norm = @p3
-                    OR (
-                      ISNULL(LTRIM(RTRIM(@p5)),'') <> ''
-                      AND X.Dim1Norm NOT LIKE '%[^0-9]%'
-                      AND SUBSTRING(X.Dim1Norm, PATINDEX('%[^0]%', X.Dim1Norm + '0'), LEN(X.Dim1Norm)) = @p5
-                    )
-                  )
-        ) THEN 1 ELSE 0 END
-    `, item, color, dim1Norm, dim2, dim1Numeric).Scan(&exists)
-
-	if err != nil {
-		return fmt.Errorf("ItemVariant kontrol query hatası: %w", err)
+	key := variantCacheKey(item, color, dim2)
+	set := map[string]struct{}(nil)
+	if cache != nil {
+		set = cache[key]
+	}
+	if set == nil {
+		var err error
+		set, err = loadVariantDim1SetTx(tx, item, color, dim2)
+		if err != nil {
+			return fmt.Errorf("ItemVariant kontrol query hatası: %w", err)
+		}
+		if cache != nil {
+			cache[key] = set
+		}
 	}
 
-	if exists != 1 {
+	_, okNorm := set[dim1Norm]
+	_, okNum := set["#NUM:"+dim1Numeric]
+	if !(okNorm || (dim1Numeric != "" && okNum)) {
 		return &models.ValidationError{
 			Code:      "INVALID_ITEM_VARIANT",
 			Message:   "Tanımsız ürün kombinasyonu",
@@ -998,6 +1036,7 @@ VALUES (
 	defer insStmt.Close()
 
 	lineResults := make([]OrderLineResult, 0, len(lines))
+	variantCache := make(map[string]map[string]struct{})
 
 	// ✅ Duplicate Guard (payload içi)
 	seenCombo := make(map[string]bool)
@@ -1045,7 +1084,7 @@ VALUES (
 
 		// ✅ INSERT ÖNCESİ ItemVariant GUARD
 		if qtyValue(ln.Qty1) > 0 {
-			if err := ValidateItemVariant(tx, ln); err != nil {
+			if err := ValidateItemVariantCached(tx, ln, variantCache); err != nil {
 				fmt.Println("❌ VARIANT GUARD (INSERT):", err)
 				return "", nil, err
 			}
@@ -1440,6 +1479,7 @@ WHERE OrderLineID=@p42 AND ISNULL(IsClosed,0)=0`)
 	// LOOP
 	// ======================================================
 	lineResults := make([]OrderLineResult, 0)
+	variantCache := make(map[string]map[string]struct{})
 	seenCombo := make(map[string]bool)
 
 	for _, ln := range lines {
@@ -1555,7 +1595,7 @@ WHERE OrderLineID=@p42 AND ISNULL(IsClosed,0)=0`)
 
 		// Variant guard
 		if qtyValue(ln.Qty1) > 0 {
-			if err := ValidateItemVariant(tx, ln); err != nil {
+			if err := ValidateItemVariantCached(tx, ln, variantCache); err != nil {
 				return nil, err
 			}
 		}