diff --git a/addons/hr_skills/models/hr_employee_skill.py b/addons/hr_skills/models/hr_employee_skill.py
index 5a63efd7832..0ed1635c854 100644
--- a/addons/hr_skills/models/hr_employee_skill.py
+++ b/addons/hr_skills/models/hr_employee_skill.py
@@ -13,9 +13,9 @@ class EmployeeSkill(models.Model):
     _order = "skill_type_id, skill_level_id"
 
     employee_id = fields.Many2one('hr.employee', required=True, ondelete='cascade')
-    skill_id = fields.Many2one('hr.skill', compute='_compute_skill_id', store=True, domain="[('skill_type_id', '=', skill_type_id)]", readonly=False, required=True)
-    skill_level_id = fields.Many2one('hr.skill.level', compute='_compute_skill_level_id', domain="[('skill_type_id', '=', skill_type_id)]", store=True, readonly=False, required=True)
-    skill_type_id = fields.Many2one('hr.skill.type', required=True)
+    skill_id = fields.Many2one('hr.skill', compute='_compute_skill_id', store=True, domain="[('skill_type_id', '=', skill_type_id)]", readonly=False, required=True, ondelete='cascade')
+    skill_level_id = fields.Many2one('hr.skill.level', compute='_compute_skill_level_id', domain="[('skill_type_id', '=', skill_type_id)]", store=True, readonly=False, required=True, ondelete='cascade')
+    skill_type_id = fields.Many2one('hr.skill.type', required=True, ondelete='cascade')
     level_progress = fields.Integer(related='skill_level_id.level_progress')
 
     _sql_constraints = [
diff --git a/addons/hr_skills/models/hr_employee_skill_log.py b/addons/hr_skills/models/hr_employee_skill_log.py
index 73c1b469f6d..0ddaf076e06 100644
--- a/addons/hr_skills/models/hr_employee_skill_log.py
+++ b/addons/hr_skills/models/hr_employee_skill_log.py
@@ -12,9 +12,9 @@ class HrEmployeeSkillLog(models.Model):
 
     employee_id = fields.Many2one('hr.employee', required=True, ondelete='cascade')
     department_id = fields.Many2one('hr.department')
-    skill_id = fields.Many2one('hr.skill', compute='_compute_skill_id', store=True, domain="[('skill_type_id', '=', skill_type_id)]", readonly=False, required=True)
-    skill_level_id = fields.Many2one('hr.skill.level', compute='_compute_skill_level_id', domain="[('skill_type_id', '=', skill_type_id)]", store=True, readonly=False, required=True)
-    skill_type_id = fields.Many2one('hr.skill.type', required=True)
+    skill_id = fields.Many2one('hr.skill', compute='_compute_skill_id', store=True, domain="[('skill_type_id', '=', skill_type_id)]", readonly=False, required=True, ondelete='cascade')
+    skill_level_id = fields.Many2one('hr.skill.level', compute='_compute_skill_level_id', domain="[('skill_type_id', '=', skill_type_id)]", store=True, readonly=False, required=True, ondelete='cascade')
+    skill_type_id = fields.Many2one('hr.skill.type', required=True, ondelete='cascade')
     level_progress = fields.Integer(related='skill_level_id.level_progress', store=True, group_operator="avg")
     date = fields.Date(default=fields.Date.context_today)