diff --git a/database/migrations/2020_12_14_091314_create_port_groups_table.php b/database/migrations/2020_12_14_091314_create_port_groups_table.php
index 6824fbd367..0ce090f9c2 100644
--- a/database/migrations/2020_12_14_091314_create_port_groups_table.php
+++ b/database/migrations/2020_12_14_091314_create_port_groups_table.php
@@ -12,16 +12,24 @@ class CreatePortGroupsTable extends Migration
      */
     public function up()
     {
-        // drop table if exists, migration can fail when creating index.
+        // migration can fail when creating index if the user's SQL server isn't new enough.
         if (Schema::hasTable('port_groups')) {
-            Schema::drop('port_groups');
-        }
+            $table = Schema::getConnection()->getDoctrineSchemaManager()
+                ->listTableDetails('port_groups');
 
-        Schema::create('port_groups', function (Blueprint $table) {
-            $table->increments('id');
-            $table->string('name')->unique();
-            $table->string('desc')->nullable();
-        });
+            // if the table exists and the index doesn't, add the index.
+            if (! $table->hasIndex('port_groups_name_unique')) {
+                Schema::table('port_groups', function (Blueprint $table) {
+                    $table->unique('name');
+                });
+            }
+        } else {
+            Schema::create('port_groups', function (Blueprint $table) {
+                $table->increments('id');
+                $table->string('name')->unique();
+                $table->string('desc')->nullable();
+            });
+        }
     }
 
     /**