diff --git a/ext/custom-addons/dp_sale_delivery_date/models/sale_order_line.py b/ext/custom-addons/dp_sale_delivery_date/models/sale_order_line.py
index 6ccbc0e7..87374d8c 100644
--- a/ext/custom-addons/dp_sale_delivery_date/models/sale_order_line.py
+++ b/ext/custom-addons/dp_sale_delivery_date/models/sale_order_line.py
@@ -7,7 +7,7 @@ from odoo import api, fields, models
 class SaleOrderLine(models.Model):
     _inherit = 'sale.order.line'
 
-    delivery_date = fields.Date('Lieferdatum', compute='_compute_delivery_date', inverse='_inverse_delivery_date', store=True, index=True)
+    delivery_date = fields.Date('Lieferdatum', compute='_compute_delivery_date', inverse='_inverse_delivery_date')
 
     @api.multi
     def _compute_delivery_date(self):