diff --git a/product_cost_price_migration.diff b/product_cost_price_migration.diff
new file mode 100644
index 0000000..e26525c
--- /dev/null
+++ b/product_cost_price_migration.diff
@@ -0,0 +1,13 @@
+diff --git a/tryton/modules/product/product.py b/tryton/modules/product/product.py
+index e46f608dcb..13d04d0212 100644
+--- a/tryton/modules/product/product.py
++++ b/tryton/modules/product/product.py
+@@ -806,7 +806,7 @@ class ProductCostPrice(ModelSQL, CompanyValueMixin):
+         # Migration from 4.4: replace template by product
+         if table.column_exist('template'):
+             columns = ['create_uid', 'create_date',
+-                'write_uid', 'write_date', 'cost_price']
++                'write_uid', 'write_date', 'cost_price', 'company']
+             cursor.execute(*sql_table.insert(
+                     columns=[Column(sql_table, c) for c in columns]
+                     + [sql_table.product],
diff --git a/sequence_exist.diff b/sequence_exist.diff
new file mode 100644
index 0000000..38d443d
--- /dev/null
+++ b/sequence_exist.diff
@@ -0,0 +1,24 @@
+diff --git a/tryton/trytond/trytond/backend/postgresql/database.py b/tryton/trytond/trytond/backend/postgresql/database.py
+index 3c891d48f3..e5ef92947c 100644
+--- a/tryton/trytond/trytond/backend/postgresql/database.py
++++ b/tryton/trytond/trytond/backend/postgresql/database.py
+@@ -676,13 +676,12 @@ class Database(DatabaseInterface):
+ 
+     def sequence_exist(self, connection, name):
+         cursor = connection.cursor()
+-        for schema in self.search_path:
+-            cursor.execute('SELECT 1 '
+-                'FROM information_schema.sequences '
+-                'WHERE sequence_name = %s AND sequence_schema = %s',
+-                (name, schema))
+-            if cursor.rowcount:
+-                return True
++        cursor.execute('SELECT 1 '
++            'FROM pg_sequences '
++            'WHERE sequencename = %s',
++            (name,))
++        if cursor.rowcount:
++            return True
+         return False
+ 
+     def sequence_create(
diff --git a/series b/series
index 7eafa16..6aa5a5d 100644
--- a/series
+++ b/series
@@ -53,3 +53,9 @@ issue12480.diff # [trytond] Support GIN index with btree_gin PostgreSQL extensio
 merge_request779.diff # [account_payment] Warn when submitting, approving or proceeding payment with reconciled line
 
 issue12576.diff # [account_stock_eu] Could not find the intrastat countries for moves
+
+product_cost_price_migration.diff # [product] Add missing column in product_cost_price
+
+table_rename.diff # [trytond] Add missing sequence rename in table_rename function
+
+sequence_exist.diff # [trytond] Search sequences using pg_sequences instead of information_schema.sequences
diff --git a/table_rename.diff b/table_rename.diff
new file mode 100644
index 0000000..7ffe3b9
--- /dev/null
+++ b/table_rename.diff
@@ -0,0 +1,16 @@
+diff --git a/tryton/trytond/trytond/backend/postgresql/table.py b/tryton/trytond/trytond/backend/postgresql/table.py
+index e874ee61c0..769f07ccd5 100644
+--- a/tryton/trytond/trytond/backend/postgresql/table.py
++++ b/tryton/trytond/trytond/backend/postgresql/table.py
+@@ -132,6 +132,11 @@ class TableHandler(TableHandlerInterface):
+                 and not cls.table_exist(new_name)):
+             cursor.execute(SQL('ALTER TABLE {} RENAME TO {}').format(
+                     Identifier(old_name), Identifier(new_name)))
++        # Migrate from 6.6: rename old sequence
++        old_sequence = old_name + '_id_seq'
++        new_sequence = new_name + '_id_seq'
++        transaction.database.sequence_rename(
++            transaction.connection, old_sequence, new_sequence)
+         # Rename history table
+         old_history = old_name + "__history"
+         new_history = new_name + "__history"