Cara mengatasi ERROR 1273 (HY000) at line 25: Unknown collation: ‘utf8mb4_unicode_520_ci’ saat import atau upload database MySQL di phpMyAdmin maupun via command-line.
Open the sql file in your text editor;
1. Search: utf8mb4_unicode_ci Replace: utf8_general_ci (Replace All)
2. Search: utf8mb4_unicode_520_ci Replace: utf8_general_ci (Replace All)
3. Search: utf8mb4 Replace: utf8 (Replace All)
Save and upload!