diff --git a/packages/core/src/LunarServiceProvider.php b/packages/core/src/LunarServiceProvider.php
index d4df153a7d..550d0a8a99 100644
--- a/packages/core/src/LunarServiceProvider.php
+++ b/packages/core/src/LunarServiceProvider.php
@@ -65,6 +65,7 @@
 use Lunar\Models\Collection;
 use Lunar\Models\Currency;
 use Lunar\Models\CustomerGroup;
+use Lunar\Models\Discount;
 use Lunar\Models\Language;
 use Lunar\Models\Order;
 use Lunar\Models\OrderLine;
@@ -79,6 +80,7 @@
 use Lunar\Observers\CollectionObserver;
 use Lunar\Observers\CurrencyObserver;
 use Lunar\Observers\CustomerGroupObserver;
+use Lunar\Observers\DiscountObserver;
 use Lunar\Observers\LanguageObserver;
 use Lunar\Observers\MediaObserver;
 use Lunar\Observers\OrderLineObserver;
@@ -298,6 +300,7 @@ protected function registerObservers(): void
     {
         Channel::observe(ChannelObserver::class);
         CustomerGroup::observe(CustomerGroupObserver::class);
+        Discount::observe(DiscountObserver::class);
         Language::observe(LanguageObserver::class);
         Currency::observe(CurrencyObserver::class);
         Url::observe(UrlObserver::class);
diff --git a/packages/core/src/Observers/DiscountObserver.php b/packages/core/src/Observers/DiscountObserver.php
new file mode 100644
index 0000000000..fa99d27596
--- /dev/null
+++ b/packages/core/src/Observers/DiscountObserver.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Lunar\Observers;
+
+use Lunar\Models\Discount;
+
+class DiscountObserver
+{
+    /**
+     * Handle the Discount "deleting" event.
+     *
+     * @return void
+     */
+    public function deleting(Discount $discount)
+    {
+        $discount->brands()->detach();
+        $discount->collections()->detach();
+        $discount->customerGroups()->detach();
+        $discount->purchasables()->detach();
+        $discount->users()->detach();
+    }
+}