diff --git a/app/Livewire/Project/Database/CreateScheduledBackup.php b/app/Livewire/Project/Database/CreateScheduledBackup.php
index bb8b8b9c7..7384adcff 100644
--- a/app/Livewire/Project/Database/CreateScheduledBackup.php
+++ b/app/Livewire/Project/Database/CreateScheduledBackup.php
@@ -2,6 +2,7 @@
 
 namespace App\Livewire\Project\Database;
 
+use App\Models\S3Storage;
 use App\Models\ScheduledDatabaseBackup;
 use App\Models\ServiceDatabase;
 use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
@@ -50,7 +51,13 @@ class CreateScheduledBackup extends Component
             $this->validate();
 
             if ($this->saveToS3) {
-                if (is_null($this->s3StorageId) || ! $this->definedS3s->contains('id', $this->s3StorageId)) {
+                $s3StorageExists = ! is_null($this->s3StorageId)
+                    && S3Storage::where('team_id', currentTeam()->id)
+                        ->where('is_usable', true)
+                        ->whereKey($this->s3StorageId)
+                        ->exists();
+
+                if (! $s3StorageExists) {
                     $this->dispatch('error', 'Please select a valid S3 storage to enable S3 backups.');
 
                     return;
diff --git a/tests/Feature/CreateScheduledBackupValidationTest.php b/tests/Feature/CreateScheduledBackupValidationTest.php
index a167511e2..4b5eec24c 100644
--- a/tests/Feature/CreateScheduledBackupValidationTest.php
+++ b/tests/Feature/CreateScheduledBackupValidationTest.php
@@ -84,6 +84,42 @@ it('rejects an S3 storage not owned by the current team', function () {
     expect(ScheduledDatabaseBackup::count())->toBe(0);
 });
 
+it('rejects an S3 storage that is reassigned after the component is mounted', function () {
+    $database = createDatabaseForScheduledBackupTest($this->team);
+    $s3 = createS3StorageForTeam($this->team);
+
+    $component = Livewire::test(CreateScheduledBackup::class, ['database' => $database])
+        ->set('frequency', '0 0 * * *')
+        ->set('saveToS3', true)
+        ->set('s3StorageId', $s3->id);
+
+    $s3->update(['team_id' => Team::factory()->create()->id]);
+
+    $component
+        ->call('submit')
+        ->assertDispatched('error');
+
+    expect(ScheduledDatabaseBackup::count())->toBe(0);
+});
+
+it('rejects an S3 storage that becomes unusable after the component is mounted', function () {
+    $database = createDatabaseForScheduledBackupTest($this->team);
+    $s3 = createS3StorageForTeam($this->team);
+
+    $component = Livewire::test(CreateScheduledBackup::class, ['database' => $database])
+        ->set('frequency', '0 0 * * *')
+        ->set('saveToS3', true)
+        ->set('s3StorageId', $s3->id);
+
+    $s3->update(['is_usable' => false]);
+
+    $component
+        ->call('submit')
+        ->assertDispatched('error');
+
+    expect(ScheduledDatabaseBackup::count())->toBe(0);
+});
+
 it('creates a scheduled backup with a valid team-owned S3 storage', function () {
     $database = createDatabaseForScheduledBackupTest($this->team);
     $s3 = createS3StorageForTeam($this->team);