diff --git a/modules/cmso/par/browser.py b/modules/cmso/par/browser.py
index 334dac567427f5b5e1495c745e97dd9957a09557..868675f94941f857dca3574e27beda323bbe9966 100644
--- a/modules/cmso/par/browser.py
+++ b/modules/cmso/par/browser.py
@@ -343,29 +343,30 @@ def iter_history(self, account):
             return sorted_transactions(self.page.iter_history())
 
         # Getting a year of history
-        nbs = ["UN", "DEUX", "TROIS", "QUATRE", "CINQ", "SIX", "SEPT", "HUIT", "NEUF", "DIX", "ONZE", "DOUZE"]
+        # We have to finish by "SIX_DERNIERES_SEMAINES" to get in priority the transactions with ids.
+        # In "SIX_DERNIERES_SEMAINES" you can have duplicates transactions without ids of the previous two months.
+        nbs = ["DEUX", "TROIS", "QUATRE", "CINQ", "SIX", "SEPT", "HUIT", "NEUF", "DIX", "ONZE", "DOUZE", "SIX_DERNIERES_SEMAINES"]
         trs = []
 
         self.history.go(data=json.dumps({"index": account._index}), page="pendingListOperations", headers=self.json_headers)
 
         has_deferred_cards = self.page.has_deferred_cards()
 
-        self.history.go(data=json.dumps({'index': account._index}), page="detailcompte", headers=self.json_headers)
-
+        self.history.go(data=json.dumps({'index': account._index, 'filtreOperationsComptabilisees': "MOIS_MOINS_UN"}), page="detailcompte", headers=self.json_headers)
         self.trs = set()
 
         for tr in self.page.iter_history(index=account._index, nbs=nbs):
             # Check for duplicates
-            if tr.id in self.trs:
+            if tr._operationid in self.trs:
                 continue
-            self.trs.add(tr.id)
+            self.trs.add(tr._operationid)
             if has_deferred_cards and tr.type == Transaction.TYPE_CARD:
                 tr.type = Transaction.TYPE_DEFERRED_CARD
                 tr.bdate = tr.rdate
 
             trs.append(tr)
 
-        return trs
+        return sorted_transactions(trs)
 
     @retry((ClientError, ServerError))
     @need_login
diff --git a/modules/cmso/par/pages.py b/modules/cmso/par/pages.py
index 9edf44c6cc14d3a30ada8c25006a983c21d02ef9..e6deabc79ac1196f04e435aebe7ee1ff91258c59 100644
--- a/modules/cmso/par/pages.py
+++ b/modules/cmso/par/pages.py
@@ -392,9 +392,9 @@ def get_keys(self):
     class iter_history(DictElement):
         def next_page(self):
             if len(Env('nbs', default=[])(self)):
-                data = {'index': Env('index')(self),
-                        'filtreOperationsComptabilisees': "MOIS_MOINS_%s" % Env('nbs')(self)[0]
-                       }
+                data = {'index': Env('index')(self)}
+                if Env('nbs')(self)[0] != "SIX_DERNIERES_SEMAINES":
+                    data.update({'filtreOperationsComptabilisees': "MOIS_MOINS_%s" % Env('nbs')(self)[0]})
                 Env('nbs')(self).pop(0)
                 return requests.Request('POST', data=json.dumps(data), headers={'Content-Type': 'application/json'})
 
@@ -432,9 +432,10 @@ def filter(self, timestamp):
             obj_raw = Transaction.Raw(Dict('libelleCourt'))
             obj_vdate = Date(Dict('dateValeur', NotAvailable), dayfirst=True, default=NotAvailable)
             obj_amount = CleanDecimal(Dict('montantEnEuro'), default=NotAvailable)
-            # DO NOT USE `OperationID` the ids aren't constant after 1 month. `clefDomirama` seems
-            # to be constant forever. Must be kept under watch though
             obj_id = Dict('clefDomirama', default='')
+            # 'operationId' is different between each session, we use it to avoid duplicates on a unique
+            # session
+            obj__operationid = Dict('operationId', default='')
 
             def parse(self, el):
                 key = Env('key', default=None)(self)