diff --git a/cor_custom/models/analytic.py b/cor_custom/models/analytic.py
index f22dfe7..ffca892 100755
--- a/cor_custom/models/analytic.py
+++ b/cor_custom/models/analytic.py
@@ -224,3 +224,17 @@ class AccountAnalyticLine(models.Model):
         for rec in self:
             if rec.start_datetime:
                 rec.date = rec.start_datetime.date()
+
+    @api.constrains('start_datetime', 'end_datetime', 'employee_id')
+    def _check_date(self):
+        for entry in self.filtered('employee_id'):
+            domain = [
+                ('start_datetime', '<', entry.end_datetime),
+                ('end_datetime', '>', entry.start_datetime),
+                ('employee_id', '=', entry.employee_id.id),
+                ('id', '!=', entry.id),
+            ]
+            entries = self.search_count(domain)
+            if entries:
+                raise ValidationError(
+                    _('You can not set 2 timesheet entries that overlaps on the same day for the same employee.'))