Make migrating after upgrading MySQL easier. (#12971)

Many people got stuck by this migration as it would fail on index creation after the table was created

database/migrations/2020_12_14_091314_create_port_groups_table.php

@@ -12,6 +12,11 @@ class CreatePortGroupsTable extends Migration
      */
     public function up()
     {
+        // drop table if exists, migration can fail when creating index.
+        if (Schema::hasTable('port_groups')) {
+            Schema::drop('port_groups');
+        }
+
         Schema::create('port_groups', function (Blueprint $table) {
             $table->increments('id');
             $table->string('name')->unique();