Prevent to revise multiple times the same asset with the same invoice line

Closes #13970

modules/account_asset/asset.py

@@ -948,6 +948,11 @@ class AssetRevision(ModelSQL, ModelView):
     @classmethod
     def __setup__(cls):
         super().__setup__()
+        table = cls.__table__()
+        cls._sql_constraints += [
+            ('asset_origin_unique', Unique(table, table.asset, table.origin),
+                'account_asset.msg_revision_asset_origin_unique'),
+            ]
         cls.__access__.add('asset')
 
     @fields.depends('asset', '_parent_asset.currency')

modules/account_asset/message.xml

@@ -24,5 +24,8 @@ this repository contains the full copyright notices and license terms. -->
         <record model="ir.message" id="msg_no_assets">
             <field name="text">There is no started asset.</field>
         </record>
+        <record model="ir.message" id="msg_revision_asset_origin_unique">
+            <field name="text">A revision origin can be used only once per asset.</field>
+        </record>
     </data>
 </tryton>