Issue after updating to 3.1.7 with UNKNOWN_CHARACTER_SET

[DMehaffy]

@kieron

        charset: "utf8mb4_unicode_ci",
      },
      options: {
        charset: "utf8mb4_unicode_ci",

Those charset settings don’t look quite right, but those settings are passed onto Knex/MySQL packages and it’s not really a Strapi thing. For some reason though either the mysql package or your actual MySQL server don’t recognize that charset.