diff --git a/business_objects/store/manufacturing_purchase_order.py b/business_objects/store/manufacturing_purchase_order.py
index 8e1a21e5..cd7d6a2e 100644
--- a/business_objects/store/manufacturing_purchase_order.py
+++ b/business_objects/store/manufacturing_purchase_order.py
@@ -295,7 +295,7 @@ class Manufacturing_Purchase_Order_Product_Link_Temp(db.Model, Store_Base):
     # id_category: int = db.Column(db.Integer)
     id_product: int = db.Column(db.Integer)
     id_permutation: int = db.Column(db.Integer)
-    csv_list_variations: str = db.Column(db.String)
+    csv_list_variations: str = db.Column(db.String(4000))
     id_unit_quantity: int = db.Column(db.Integer)
     quantity_used: float = db.Column(db.Float)
     quantity_produced: float = db.Column(db.Float)
diff --git a/business_objects/store/supplier_purchase_order.py b/business_objects/store/supplier_purchase_order.py
index 24bda6aa..d73772c8 100644
--- a/business_objects/store/supplier_purchase_order.py
+++ b/business_objects/store/supplier_purchase_order.py
@@ -116,7 +116,7 @@ class Supplier_Purchase_Order_Product_Link(db.Model, Store_Base):
     id_category = db.Column(db.Integer)
     id_product = db.Column(db.Integer)
     id_permutation = db.Column(db.Integer)
-    csv_id_pairs_variation = db.Column(db.String)
+    csv_id_pairs_variation = db.Column(db.String(4000))
     id_unit_quantity = db.Column(db.Integer)
     name_permutation = db.Column(db.String(255))
     quantity_ordered = db.Column(db.Float)
@@ -294,7 +294,7 @@ class Supplier_Purchase_Order_Product_Link_Temp(db.Model, Store_Base):
     id_order = db.Column(db.Integer)
     id_product = db.Column(db.Integer)
     id_permutation = db.Column(db.Integer)
-    csv_list_variations = db.Column(db.String)
+    csv_list_variations = db.Column(db.String(4000))
     id_unit_quantity = db.Column(db.Integer)
     quantity_ordered = db.Column(db.Float)
     quantity_received = db.Column(db.Float)