[FIX] partner_vat_unique: constrain on company change

partner_vat_unique/__manifest__.py

@@ -4,7 +4,7 @@
     "name": "Partner VAT Unique",
     "summary":
         "Module to make the VAT number unique for customers and suppliers.",
-    "version": "12.0.1.0.2",
+    "version": "12.0.1.0.3",
     "category": "Customer Relationship Management",
     "website": "https://github.com/OCA/partner-contact",
     "author": "Grant Thornton S.L.P, Odoo Community Association (OCA)",

partner_vat_unique/models/res_partner.py

@@ -12,7 +12,7 @@ class ResPartner(models.Model):
 
     vat = fields.Char(copy=False)
 
-    @api.constrains('vat')
+    @api.constrains('vat', 'company_id')
     def _check_vat_unique(self):
         for record in self:
             if record.parent_id or not record.vat: