diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index 2c566528530..cf22d15e040 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -722,7 +722,9 @@ class PurchaseOrderLine(models.Model):
         for move in self.move_ids.filtered(lambda x: x.state != 'cancel' and not x.location_dest_id.usage == "supplier"):
             qty += move.product_uom._compute_quantity(move.product_uom_qty, self.product_uom, rounding_method='HALF-UP')
         template = {
-            'name': self.name or '',
+            # truncate to 2000 to avoid triggering index limit error
+            # TODO: remove index in master?
+            'name': (self.name or '')[:2000],
             'product_id': self.product_id.id,
             'product_uom': self.product_uom.id,
             'date': self.order_id.date_approve,