title: The Attendance data by excel file imported into the attendance module have been lost in Odoo 13. How to fix it?
body: <p>I have successfully imported the attendance data into attendance data of 11/13/2019 by excel file.</p>
  
  <p><a href="https://i.stack.imgur.com/udBV0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/udBV0.png" alt="enter image description here"></a></p>
  
  <p>And I have successfully imported the attendance data of next day too.</p>
  
  <p><a href="https://i.stack.imgur.com/Kax4g.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Kax4g.png" alt="enter image description here"></a></p>
  
  <p>But the data of day 13 have been lost as you can see.</p>
  
  <p>How to fix it?</p>