diff --git a/mrp_project/models/account_analytic_line.py b/mrp_project/models/account_analytic_line.py
index 9f613a8fc..c9da4bc1f 100644
--- a/mrp_project/models/account_analytic_line.py
+++ b/mrp_project/models/account_analytic_line.py
@@ -10,8 +10,7 @@ class AccountAnalyticLine(models.Model):
     _inherit = 'account.analytic.line'
 
     mrp_production_id = fields.Many2one(
-        comodel_name='mrp.production', string='Manufacturing Order',
-        related="task_id.mrp_production_id", store=True)
+        comodel_name='mrp.production', string='Manufacturing Order')
     workorder = fields.Many2one(
         comodel_name='mrp.production.workcenter.line', string='Work Order',
         related="task_id.workorder", store=True)