diff --git a/account_financial_report/__manifest__.py b/account_financial_report/__manifest__.py
index 6cb6ab44..7adf0068 100644
--- a/account_financial_report/__manifest__.py
+++ b/account_financial_report/__manifest__.py
@@ -4,7 +4,7 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 {
     'name': 'Account Financial Reports',
-    'version': '11.0.2.2.0',
+    'version': '11.0.2.2.1',
     'category': 'Reporting',
     'summary': 'OCA Financial Reports',
     'author': 'Camptocamp SA,'
diff --git a/account_financial_report/i18n/account_financial_report.pot b/account_financial_report/i18n/account_financial_report.pot
index c07de1d3..c52b5cc3 100644
--- a/account_financial_report/i18n/account_financial_report.pot
+++ b/account_financial_report/i18n/account_financial_report.pot
@@ -398,7 +398,7 @@ msgid "Centralized"
 msgstr ""
 
 #. module: account_financial_report
-#: code:addons/account_financial_report/report/general_ledger.py:1233
+#: code:addons/account_financial_report/report/general_ledger.py:1237
 #, python-format
 msgid "Centralized Entries"
 msgstr ""
@@ -799,6 +799,7 @@ msgid "Detail Taxes"
 msgstr ""
 
 #. module: account_financial_report
+#: model:ir.model.fields,field_description:account_financial_report.field_account_financial_report_abstract_display_name
 #: model:ir.model.fields,field_description:account_financial_report.field_aged_partner_balance_wizard_display_name
 #: model:ir.model.fields,field_description:account_financial_report.field_general_ledger_report_wizard_display_name
 #: model:ir.model.fields,field_description:account_financial_report.field_journal_ledger_report_wizard_display_name
@@ -1150,6 +1151,7 @@ msgid "Hierarchy On"
 msgstr ""
 
 #. module: account_financial_report
+#: model:ir.model.fields,field_description:account_financial_report.field_account_financial_report_abstract_id
 #: model:ir.model.fields,field_description:account_financial_report.field_aged_partner_balance_wizard_id
 #: model:ir.model.fields,field_description:account_financial_report.field_general_ledger_report_wizard_id
 #: model:ir.model.fields,field_description:account_financial_report.field_journal_ledger_report_wizard_id
@@ -1308,6 +1310,7 @@ msgid "Label"
 msgstr ""
 
 #. module: account_financial_report
+#: model:ir.model.fields,field_description:account_financial_report.field_account_financial_report_abstract___last_update
 #: model:ir.model.fields,field_description:account_financial_report.field_aged_partner_balance_wizard___last_update
 #: model:ir.model.fields,field_description:account_financial_report.field_general_ledger_report_wizard___last_update
 #: model:ir.model.fields,field_description:account_financial_report.field_journal_ledger_report_wizard___last_update
@@ -1511,10 +1514,10 @@ msgid "No group"
 msgstr ""
 
 #. module: account_financial_report
-#: code:addons/account_financial_report/report/general_ledger.py:684
-#: code:addons/account_financial_report/report/general_ledger.py:981
-#: code:addons/account_financial_report/report/open_items.py:302
-#: code:addons/account_financial_report/report/open_items.py:551
+#: code:addons/account_financial_report/report/general_ledger.py:688
+#: code:addons/account_financial_report/report/general_ledger.py:985
+#: code:addons/account_financial_report/report/open_items.py:306
+#: code:addons/account_financial_report/report/open_items.py:555
 #, python-format
 msgid "No partner allocated"
 msgstr ""
@@ -2121,6 +2124,11 @@ msgstr ""
 msgid "account.group"
 msgstr ""
 
+#. module: account_financial_report
+#: model:ir.model,name:account_financial_report.model_account_financial_report_abstract
+msgid "account_financial_report_abstract"
+msgstr ""
+
 #. module: account_financial_report
 #: model:ir.ui.view,arch_db:account_financial_report.aged_partner_balance_wizard
 #: model:ir.ui.view,arch_db:account_financial_report.general_ledger_wizard
diff --git a/account_financial_report/report/__init__.py b/account_financial_report/report/__init__.py
index 41936758..ae2ee3d5 100644
--- a/account_financial_report/report/__init__.py
+++ b/account_financial_report/report/__init__.py
@@ -3,6 +3,7 @@
 # © 2016 Julien Coux (Camptocamp)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).-
 
+from . import abstract_report
 from . import abstract_report_xlsx
 from . import aged_partner_balance
 from . import aged_partner_balance_xlsx
diff --git a/account_financial_report/report/abstract_report.py b/account_financial_report/report/abstract_report.py
new file mode 100644
index 00000000..6f8feee6
--- /dev/null
+++ b/account_financial_report/report/abstract_report.py
@@ -0,0 +1,21 @@
+# Copyright 2018 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import models
+
+
+class AbstractReport(models.AbstractModel):
+    _name = 'account_financial_report_abstract'
+
+    def _transient_clean_rows_older_than(self, seconds):
+        assert self._transient, \
+            "Model %s is not transient, it cannot be vacuumed!" % self._name
+        # Never delete rows used in last 5 minutes
+        seconds = max(seconds, 300)
+        query = """
+DELETE FROM """ + self._table + """
+WHERE COALESCE(
+    write_date, self.create_date, (now() at time zone 'UTC'))::timestamp
+    < ((now() at time zone 'UTC') - interval %s)
+"""
+        self.env.cr.execute(query, ("%s seconds" % seconds,))
diff --git a/account_financial_report/report/aged_partner_balance.py b/account_financial_report/report/aged_partner_balance.py
index ae702824..a00d32ee 100644
--- a/account_financial_report/report/aged_partner_balance.py
+++ b/account_financial_report/report/aged_partner_balance.py
@@ -18,6 +18,7 @@ class AgedPartnerBalanceReport(models.TransientModel):
     """
 
     _name = 'report_aged_partner_balance'
+    _inherit = 'account_financial_report_abstract'
 
     # Filters fields, used for data computation
     date_at = fields.Date()
@@ -39,6 +40,7 @@ class AgedPartnerBalanceReport(models.TransientModel):
 
 class AgedPartnerBalanceReportAccount(models.TransientModel):
     _name = 'report_aged_partner_balance_account'
+    _inherit = 'account_financial_report_abstract'
     _order = 'code ASC'
 
     report_id = fields.Many2one(
@@ -81,6 +83,7 @@ class AgedPartnerBalanceReportAccount(models.TransientModel):
 
 class AgedPartnerBalanceReportPartner(models.TransientModel):
     _name = 'report_aged_partner_balance_partner'
+    _inherit = 'account_financial_report_abstract'
 
     report_account_id = fields.Many2one(
         comodel_name='report_aged_partner_balance_account',
@@ -124,6 +127,7 @@ ORDER BY
 
 class AgedPartnerBalanceReportLine(models.TransientModel):
     _name = 'report_aged_partner_balance_line'
+    _inherit = 'account_financial_report_abstract'
 
     report_partner_id = fields.Many2one(
         comodel_name='report_aged_partner_balance_partner',
@@ -144,6 +148,7 @@ class AgedPartnerBalanceReportLine(models.TransientModel):
 
 class AgedPartnerBalanceReportMoveLine(models.TransientModel):
     _name = 'report_aged_partner_balance_move_line'
+    _inherit = 'account_financial_report_abstract'
 
     report_partner_id = fields.Many2one(
         comodel_name='report_aged_partner_balance_partner',
diff --git a/account_financial_report/report/general_ledger.py b/account_financial_report/report/general_ledger.py
index 4d953cdf..0299c55c 100644
--- a/account_financial_report/report/general_ledger.py
+++ b/account_financial_report/report/general_ledger.py
@@ -22,6 +22,7 @@ class GeneralLedgerReport(models.TransientModel):
     """
 
     _name = 'report_general_ledger'
+    _inherit = 'account_financial_report_abstract'
 
     # Filters fields, used for data computation
     date_from = fields.Date()
@@ -74,6 +75,7 @@ class GeneralLedgerReport(models.TransientModel):
 class GeneralLedgerReportAccount(models.TransientModel):
 
     _name = 'report_general_ledger_account'
+    _inherit = 'account_financial_report_abstract'
     _order = 'code ASC'
 
     report_id = fields.Many2one(
@@ -118,6 +120,7 @@ class GeneralLedgerReportAccount(models.TransientModel):
 class GeneralLedgerReportPartner(models.TransientModel):
 
     _name = 'report_general_ledger_partner'
+    _inherit = 'account_financial_report_abstract'
 
     report_account_id = fields.Many2one(
         comodel_name='report_general_ledger_account',
@@ -166,6 +169,7 @@ ORDER BY
 class GeneralLedgerReportMoveLine(models.TransientModel):
 
     _name = 'report_general_ledger_move_line'
+    _inherit = 'account_financial_report_abstract'
 
     report_account_id = fields.Many2one(
         comodel_name='report_general_ledger_account',
diff --git a/account_financial_report/report/journal_ledger.py b/account_financial_report/report/journal_ledger.py
index 16e8ff1e..352b4c49 100644
--- a/account_financial_report/report/journal_ledger.py
+++ b/account_financial_report/report/journal_ledger.py
@@ -9,6 +9,7 @@ DIGITS = (16, 2)
 class ReportJournalLedger(models.TransientModel):
 
     _name = 'report_journal_ledger'
+    _inherit = 'account_financial_report_abstract'
 
     date_from = fields.Date(
         required=True
@@ -615,6 +616,7 @@ class ReportJournalLedger(models.TransientModel):
 class ReportJournalLedgerJournal(models.TransientModel):
 
     _name = 'report_journal_ledger_journal'
+    _inherit = 'account_financial_report_abstract'
 
     name = fields.Char(
         required=True,
@@ -657,6 +659,7 @@ class ReportJournalLedgerJournal(models.TransientModel):
 class ReportJournalLedgerMove(models.TransientModel):
 
     _name = 'report_journal_ledger_move'
+    _inherit = 'account_financial_report_abstract'
 
     report_id = fields.Many2one(
         comodel_name='report_journal_ledger',
@@ -688,6 +691,7 @@ class ReportJournalLedgerMove(models.TransientModel):
 class ReportJournalLedgerMoveLine(models.TransientModel):
 
     _name = 'report_journal_ledger_move_line'
+    _inherit = 'account_financial_report_abstract'
     _order = 'partner_id desc, account_id desc'
 
     report_id = fields.Many2one(
@@ -753,6 +757,7 @@ class ReportJournalLedgerMoveLine(models.TransientModel):
 class ReportJournalLedgerReportTaxLine(models.TransientModel):
 
     _name = 'report_journal_ledger_report_tax_line'
+    _inherit = 'account_financial_report_abstract'
     _order = 'tax_code'
 
     report_id = fields.Many2one(
diff --git a/account_financial_report/report/open_items.py b/account_financial_report/report/open_items.py
index 40af61c7..8ac07d68 100644
--- a/account_financial_report/report/open_items.py
+++ b/account_financial_report/report/open_items.py
@@ -17,6 +17,7 @@ class OpenItemsReport(models.TransientModel):
     """
 
     _name = 'report_open_items'
+    _inherit = 'account_financial_report_abstract'
 
     # Filters fields, used for data computation
     date_at = fields.Date()
@@ -37,6 +38,7 @@ class OpenItemsReport(models.TransientModel):
 class OpenItemsReportAccount(models.TransientModel):
 
     _name = 'report_open_items_account'
+    _inherit = 'account_financial_report_abstract'
     _order = 'code ASC'
 
     report_id = fields.Many2one(
@@ -70,6 +72,7 @@ class OpenItemsReportAccount(models.TransientModel):
 class OpenItemsReportPartner(models.TransientModel):
 
     _name = 'report_open_items_partner'
+    _inherit = 'account_financial_report_abstract'
 
     report_account_id = fields.Many2one(
         comodel_name='report_open_items_account',
@@ -114,6 +117,7 @@ ORDER BY
 class OpenItemsReportMoveLine(models.TransientModel):
 
     _name = 'report_open_items_move_line'
+    _inherit = 'account_financial_report_abstract'
 
     report_partner_id = fields.Many2one(
         comodel_name='report_open_items_partner',
diff --git a/account_financial_report/report/trial_balance.py b/account_financial_report/report/trial_balance.py
index 18e0acb3..92e65080 100644
--- a/account_financial_report/report/trial_balance.py
+++ b/account_financial_report/report/trial_balance.py
@@ -17,6 +17,7 @@ class TrialBalanceReport(models.TransientModel):
     """
 
     _name = 'report_trial_balance'
+    _inherit = 'account_financial_report_abstract'
 
     # Filters fields, used for data computation
     date_from = fields.Date()
@@ -51,6 +52,7 @@ class TrialBalanceReport(models.TransientModel):
 
 class TrialBalanceReportAccount(models.TransientModel):
     _name = 'report_trial_balance_account'
+    _inherit = 'account_financial_report_abstract'
     _order = 'sequence, code ASC, name'
 
     report_id = fields.Many2one(
@@ -104,6 +106,7 @@ class TrialBalanceReportAccount(models.TransientModel):
 
 class TrialBalanceReportPartner(models.TransientModel):
     _name = 'report_trial_balance_partner'
+    _inherit = 'account_financial_report_abstract'
 
     report_account_id = fields.Many2one(
         comodel_name='report_trial_balance_account',
diff --git a/account_financial_report/report/vat_report.py b/account_financial_report/report/vat_report.py
index bc3fc6a3..6dea150e 100644
--- a/account_financial_report/report/vat_report.py
+++ b/account_financial_report/report/vat_report.py
@@ -6,6 +6,7 @@ from odoo import api, fields, models
 
 class VATReport(models.TransientModel):
     _name = "report_vat_report"
+    _inherit = 'account_financial_report_abstract'
     """ Here, we just define class fields.
     For methods, go more bottom at this file.
 
@@ -35,6 +36,7 @@ class VATReport(models.TransientModel):
 
 class VATReportTaxTags(models.TransientModel):
     _name = 'report_vat_report_taxtag'
+    _inherit = 'account_financial_report_abstract'
     _order = 'code ASC'
 
     report_id = fields.Many2one(
@@ -68,6 +70,7 @@ class VATReportTaxTags(models.TransientModel):
 
 class VATReportTax(models.TransientModel):
     _name = 'report_vat_report_tax'
+    _inherit = 'account_financial_report_abstract'
     _order = 'name ASC'
 
     report_tax_id = fields.Many2one(