diff --git a/app/Models/ItemCharacteristic.php b/app/Models/ItemCharacteristic.php
index 08a0c422..ca57eae5 100644
--- a/app/Models/ItemCharacteristic.php
+++ b/app/Models/ItemCharacteristic.php
@@ -146,21 +146,6 @@ class ItemCharacteristic extends Model
         'zmm_operating_temperature',
         'zmm_axial_force',
         'zmm_mrp',
-        'zmm_1',
-        'zmm_2',
-        'zmm_3',
-        'zmm_4',
-        'zmm_5',
-        'zmm_6',
-        'zmm_7',
-        'zmm_8',
-        'zmm_9',
-        'zmm_10',
-        'zmm_11',
-        'zmm_12',
-        'zmm_13',
-        'zmm_14',
-        'zmm_15',
         'created_at',
         'updated_at',
         'created_by',