[Strapi MongoDB Atlas] Error: An index error happened, it was not applied

Questions and Answers
1
System Information
  • Strapi Version: 3.6.5
  • Operating System: Windows 10
  • Database: MongoDB Atlas
  • Node Version: 14.17.3
  • Yarn Version: 1.22.10

Hi, I start Strapi but suddenly I face an error saying :

error An index error happened, it was not applied.

Just like this :

strapi-error
strapi-error1131×653 63.2 KB

Why the error happened and how to prevent it? Thank you.