From 7ba170e072c1534eed7e830f9f73af98a73ee4ec Mon Sep 17 00:00:00 2001
From: laurentbarontini <l.barontini@open-squared.ch>
Date: Sat, 21 Mar 2026 22:18:29 +0100
Subject: [PATCH] 21.03.26

---
 modules/purchase_trade/purchase.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index 493f7ce..81a355a 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -723,9 +723,10 @@ class AssayElement(ModelSQL, ModelView):
     default_unit = fields.Many2One('product.uom', "Default Unit")
 
     type = fields.Selection([
+        (None, ''),
         ('metal', 'Metal'),
         ('impurity', 'Impurity'),
-    ])
+    ], "Type")
 
 class QualityAnalysis(ModelSQL,ModelView):
     "Quality Analysis"