diff --git a/mrp_multi_level/models/mrp_inventory.py b/mrp_multi_level/models/mrp_inventory.py
index 82107739d..8ba9d26c4 100644
--- a/mrp_multi_level/models/mrp_inventory.py
+++ b/mrp_multi_level/models/mrp_inventory.py
@@ -30,6 +30,7 @@ class MrpInventory(models.Model):
         string="Product Parameters",
         index=True,
         required=True,
+        ondelete="cascade",
     )
     company_id = fields.Many2one(
         comodel_name="res.company",
diff --git a/mrp_multi_level/models/mrp_move.py b/mrp_multi_level/models/mrp_move.py
index d2ea26196..0345e9280 100644
--- a/mrp_multi_level/models/mrp_move.py
+++ b/mrp_multi_level/models/mrp_move.py
@@ -17,6 +17,7 @@ class MrpMove(models.Model):
         string="Product MRP Area",
         index=True,
         required=True,
+        ondelete="cascade",
     )
     mrp_area_id = fields.Many2one(
         comodel_name="mrp.area",
diff --git a/mrp_multi_level/models/mrp_planned_order.py b/mrp_multi_level/models/mrp_planned_order.py
index a8b8bde8b..2685f53e2 100644
--- a/mrp_multi_level/models/mrp_planned_order.py
+++ b/mrp_multi_level/models/mrp_planned_order.py
@@ -17,6 +17,7 @@ class MrpPlannedOrder(models.Model):
         string="Product MRP Area",
         index=True,
         required=True,
+        ondelete="cascade",
     )
     mrp_area_id = fields.Many2one(
         comodel_name="mrp.area",