diff --git a/issue12547.diff b/issue12547.diff
new file mode 100644
index 0000000..469f35a
--- /dev/null
+++ b/issue12547.diff
@@ -0,0 +1,25 @@
+diff --git a/tryton/modules/stock_lot/stock.py b/tryton/modules/stock_lot/stock.py
+index 734018dbe8..1367b57e5f 100644
+--- a/tryton/modules/stock_lot/stock.py
++++ b/tryton/modules/stock_lot/stock.py
+@@ -420,8 +420,7 @@ class Move(metaclass=PoolMeta):
+
+     def check_lot(self):
+         "Check if lot is required"
+-        if (self.state == 'done'
+-                and self.internal_quantity
++        if (self.internal_quantity
+                 and not self.lot
+                 and self.product.lot_is_required(
+                     self.from_location, self.to_location)):
+@@ -430,8 +429,9 @@ class Move(metaclass=PoolMeta):
+                     product=self.product.rec_name))
+
+     @classmethod
+-    def validate(cls, moves):
+-        super(Move, cls).validate(moves)
++    @ModelView.button
++    def do(cls, moves):
++        super().do(moves)
+         for move in moves:
+             move.check_lot()
diff --git a/issue12799.diff b/issue12799.diff
new file mode 100644
index 0000000..f3a5ec7
--- /dev/null
+++ b/issue12799.diff
@@ -0,0 +1,15 @@
+diff --git a/tryton/sao/src/model.js b/tryton/sao/src/model.js
+index 81e8639d9e..8b55441294 100644
+--- a/tryton/sao/src/model.js
++++ b/tryton/sao/src/model.js
+@@ -2071,6 +2071,10 @@
+                     rec_name = '';
+                 }
+             }
++            if (value < 0) {
++                value = null;
++                rec_name = '';
++            }
+             Sao.setdefault(
+                 record._values, this.name + '.', {}).rec_name = rec_name;
+             Sao.field.Many2One._super.set_client.call(this, record, value,
diff --git a/issue12823.diff b/issue12823.diff
new file mode 100644
index 0000000..97d5508
--- /dev/null
+++ b/issue12823.diff
@@ -0,0 +1,36 @@
+diff --git a/tryton/modules/account/move.py b/tryton/modules/account/move.py
+index b827237af4..ddbca0ae19 100644
+--- a/tryton/modules/account/move.py
++++ b/tryton/modules/account/move.py
+@@ -1098,7 +1098,7 @@ class Line(MoveLineMixin, ModelSQL, ModelView):
+     def on_change_move(self):
+         if self.move:
+             if not self.debit and not self.credit:
+-                total = sum(l.debit - l.credit
++                total = sum((l.debit or 0) - (l.credit or 0)
+                     for l in getattr(self.move, 'lines', []))
+                 self.debit = -total if total < 0 else Decimal(0)
+                 self.credit = total if total > 0 else Decimal(0)
+@@ -1169,7 +1169,8 @@ class Line(MoveLineMixin, ModelSQL, ModelView):
+         'Set correct sign to amount_second_currency'
+         if self.amount_second_currency:
+             self.amount_second_currency = \
+-                self.amount_second_currency.copy_sign(self.debit - self.credit)
++                self.amount_second_currency.copy_sign(
++                    (self.debit or 0) - (self.credit or 0))
+
+     @fields.depends('account')
+     def on_change_account(self):
+@@ -2402,9 +2403,11 @@ class ReconcileShow(ModelView):
+         if self.currency:
+             for line in self.lines:
+                 if line.second_currency == self.currency:
+-                    amount += line.amount_second_currency
++                    amount += (
++                        line.amount_second_currency or 0)
+                 elif line.currency == self.currency:
+-                    amount += line.debit - line.credit
++                    amount += (
++                        (line.debit or 0) - (line.credit or 0))
+             amount = self.currency.round(amount)
+         self.write_off_amount = amount
diff --git a/series b/series
index a5a8279..1d20315 100644
--- a/series
+++ b/series
@@ -62,6 +62,12 @@ update_trees_chart_accounts.diff # [account_account] Update trees of chart of ac
 
 sao_document_field.diff # [sao] fix issue with loading of 'document' fields in sao
 
+issue12799.diff # [sao] Convert negative id value as None when set by the client
+
+issue12547.diff # [stock_lot] Check lot required only when changing move to done
+
+issue12823.diff # [account] Use 0 as fallback for missing debit or credit in on_change functions
+
 product_cost_price_migration.diff # [product] Add missing column in product_cost_price
 
 sequence_exist.diff # [trytond] Search sequences using pg_sequences instead of information_schema.sequences