Fix copy methods to not copy template

account.py

@@ -824,6 +824,8 @@ class Account(ModelSQL, ModelView):
     def copy(cls, accounts, default=None):
         if default is None:
             default = {}
+        else:
+            default = default.copy()
         default.setdefault('template')
         default.setdefault('deferrals', [])
         new_accounts = super(Account, cls).copy(accounts, default=default)

tax.py

@@ -231,6 +231,15 @@ class TaxCode(ModelSQL, ModelView):
             (cls._rec_name,) + tuple(clause[1:]),
             ]
 
+    @classmethod
+    def copy(cls, codes, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('template')
+        return super(TaxCode, cls).copy(codes, default=default)
+
     @classmethod
     def delete(cls, codes):
         codes = cls.search([
@@ -769,6 +778,15 @@ class Tax(ModelSQL, ModelView):
             return self.company.currency.digits
         return 2
 
+    @classmethod
+    def copy(cls, taxes, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('template')
+        return super(Tax, cls).copy(taxes, default=default)
+
     def _process_tax(self, price_unit):
         if self.type == 'percentage':
             amount = price_unit * self.rate
@@ -1218,6 +1236,15 @@ class TaxRule(ModelSQL, ModelView):
     def default_company():
         return Transaction().context.get('company')
 
+    @classmethod
+    def copy(cls, rules, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('template')
+        return super(TaxRule, cls).copy(rules, default=default)
+
     def apply(self, tax, pattern):
         '''
         Apply rule on tax
@@ -1451,6 +1478,15 @@ class TaxRuleLine(ModelSQL, ModelView, MatchMixin):
         table, _ = tables[None]
         return [Case((table.sequence == Null, 0), else_=1), table.sequence]
 
+    @classmethod
+    def copy(cls, lines, default=None):
+        if default is None:
+            default = {}
+        else:
+            default = default.copy()
+        default.setdefault('template')
+        return super(TaxRuleLine, cls).copy(lines, default=default)
+
     def match(self, pattern):
         if 'group' in pattern and not self.group:
             if pattern['group']: