diff --git a/project_ux/models/project_task.py b/project_ux/models/project_task.py
index adc79fcc..6415d8b7 100644
--- a/project_ux/models/project_task.py
+++ b/project_ux/models/project_task.py
@@ -14,6 +14,8 @@ class Task(models.Model):
     _inherit = "project.task"
 
     display_in_project = fields.Boolean(default=True)
+    partner_id = fields.Many2one(index="btree_not_null")
+    recurrence_id = fields.Many2one(index="btree_not_null")
 
     @api.depends("project_id")
     def _compute_display_in_project(self):