767 bytes is the stated prefix limitation for InnoDB tables in MySQL version 5.6

[RedPlatypus]

Some of the multi column indices in 2017_04_08_163453_create_world_countries_table.php 2017_04_08_163453_create_world_divisions_table.php Exceeded the 767 byte limit of MySQL version 5.6

I modified the tables so instead of names being 255 chars, they were 170 chars. Not sure if this will have side effects later on, but thought I would post here just incase it helps someone else.

Schema::create('world_countries', function(Blueprint $table)
{
    $table->increments('id')->comment('Auto increase ID');
    $table->integer('continent_id')->unsigned()->comment('Continent ID');
    $table->string('name', 170)->default('')->comment('Country Common Name');
    $table->string('full_name', 255)->nullable()->comment('Country Fullname');
    $table->string('capital', 255)->nullable()->comment('Capital Common Name');
    $table->string('code', 4)->nullable()->comment('ISO3166-1-Alpha-2');
    $table->string('code_alpha3', 6)->nullable()->comment('ISO3166-1-Alpha-3');
    $table->string('emoji', 16)->nullable()->comment('Country Emoji');
    $table->boolean('has_division')->default(0)->comment('Has Division');
    $table->string('currency_code', 3)->nullable()->comment('iso_4217_code');
    $table->string('currency_name', 128)->nullable()->comment('iso_4217_name');
    $table->string('tld', 8)->nullable()->comment('Top level domain');
    $table->string('callingcode', 8)->nullable()->comment('Calling prefix');
    $table->unique(['continent_id','name'], 'uniq_country');
});

Schema::create('world_divisions', function(Blueprint $table)
{
    $table->increments('id')->comment('Auto Increase ID');
    $table->integer('country_id')->unsigned()->comment('Country ID');
    $table->string('name', 175)->default('')->comment('Division Common Name');
    $table->string('full_name', 255)->nullable()->comment('Division Full Name');
    $table->string('code', 64)->nullable()->comment('ISO 3166-2 Code');
    $table->boolean('has_city')->default(0)->comment('Has city?');
    $table->unique(['country_id','name'], 'uniq_division');
});