1. ERROR 1273 HY000 at line 1520 Unknown collation 39utf8mb4_0900_ai_ci39

    ERROR 1273 HY000 at line 1520 Unknown collation 39utf8mb4_0900_ai_ci39

  2. General error 3988 Conversion from collation utf8_unicode_ci into utf8mb4_0900_ai_ci impossible for

    General error 3988 Conversion from collation utf8_unicode_ci into utf8mb4_0900_ai_ci impossible for