diff --git a/src/database/migrations/2020_09_02_150004_unique_discounts.php b/src/database/migrations/2020_09_02_150004_unique_discounts.php
new file mode 100644
index 00000000..fc2b498c
--- /dev/null
+++ b/src/database/migrations/2020_09_02_150004_unique_discounts.php
@@ -0,0 +1,39 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+// phpcs:ignore
+class UniqueDiscounts extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table(
+            'discounts',
+            function (Blueprint $table) {
+                $table->unique(['discount', 'description', 'code', 'active']);
+            }
+        );
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table(
+            'discounts',
+            function (Blueprint $table) {
+                $table->dropUnique(['discount', 'description', 'code', 'active']);
+            }
+        );
+    }
+}