Which are the most commmon reasons for Schengen visa rejection?

Here are some reasons behind Schengen Visa rejection for Indian applicants:

1. Incomplete Schengen Visa Application
2. Insufficient Fund Proof
3. No Travel Insurance
4. No Clear Purpose of Travel
5. Previous Visa Violations
6. No Proof of Accommodation
7. Weak Ties to Home Country
8. Invalid or Damaged Passport
9. Incorrect Supported