diff --git a/pms/models/pms_availability.py b/pms/models/pms_availability.py
index 3f705cefd..3e35770ee 100644
--- a/pms/models/pms_availability.py
+++ b/pms/models/pms_availability.py
@@ -172,7 +172,7 @@ class PmsAvailability(models.Model):
                             )
                         ]
             else:
-                record.parent_avail_id = False
+                record.child_avail_ids = False
 
     @api.model
     def get_rooms_not_avail(
diff --git a/pms/models/pms_availability_plan.py b/pms/models/pms_availability_plan.py
index 76b16ba83..5052ecc4b 100644
--- a/pms/models/pms_availability_plan.py
+++ b/pms/models/pms_availability_plan.py
@@ -81,7 +81,7 @@ class PmsAvailabilityPlan(models.Model):
         )
 
     @api.model
-    def update_quota(self, pricelist_id, room_type_id, date, line):
+    def update_quota(self, pricelist_id, room_type_id, date, impacts_quota_id=False):
         if pricelist_id and room_type_id and date:
             rule = self.env["pms.availability.plan.rule"].search(
                 [
@@ -96,19 +96,19 @@ class PmsAvailabilityPlan(models.Model):
                 if rule and rule.quota != -1 and rule.quota > 0:
 
                     # the line has no rule item applied before
-                    if not line.impacts_quota:
+                    if not impacts_quota_id:
                         rule.quota -= 1
                         return rule.id
 
                     # the line has a rule item applied before
-                    elif line.impacts_quota != rule.id:
+                    elif impacts_quota_id != rule.id:
 
                         # decrement quota on current rule item
                         rule.quota -= 1
 
                         # check old rule item
                         old_rule = self.env["pms.availability.plan.rule"].search(
-                            [("id", "=", line.impacts_quota)]
+                            [("id", "=", impacts_quota_id)]
                         )
 
                         # restore quota in old rule item
@@ -118,9 +118,9 @@ class PmsAvailabilityPlan(models.Model):
                         return rule.id
 
         # in any case, check old rule item
-        if line.impacts_quota:
+        if impacts_quota_id:
             old_rule = self.env["pms.availability.plan.rule"].search(
-                [("id", "=", line.impacts_quota)]
+                [("id", "=", impacts_quota_id)]
             )
             # and restore quota in old rule item
             if old_rule:
diff --git a/pms/models/pms_reservation_line.py b/pms/models/pms_reservation_line.py
index 07859e22a..f9152badb 100644
--- a/pms/models/pms_reservation_line.py
+++ b/pms/models/pms_reservation_line.py
@@ -108,9 +108,9 @@ class PmsReservationLine(models.Model):
     impacts_quota = fields.Integer(
         string="Impacts quota",
         help="This line has been taken into account in the avail quota",
-        readonly=False,
+        readonly=True,
         store=True,
-        compute="_compute_impact_quota",
+        compute="_compute_impacts_quota",
     )
 
     _sql_constraints = [
@@ -330,14 +330,18 @@ class PmsReservationLine(models.Model):
                             line.room_id = list(bests.keys())[0]
 
     @api.depends("reservation_id.room_type_id", "reservation_id.pricelist_id")
-    def _compute_impact_quota(self):
+    def _compute_impacts_quota(self):
         for line in self:
             reservation = line.reservation_id
+            if isinstance(line.id, int):
+                impacts_quota = False
+            else:
+                impacts_quota = line.impacts_quota
             line.impacts_quota = self.env["pms.availability.plan"].update_quota(
                 pricelist_id=reservation.pricelist_id,
                 room_type_id=reservation.room_type_id,
                 date=line.date,
-                line=line,
+                impacts_quota_id=impacts_quota,
             )
 
     @api.depends(