diff --git a/Modules/Helpdesk/Livewire/SettingsManager.php b/Modules/Helpdesk/Livewire/SettingsManager.php
index 05bef509..a2ab264f 100644
--- a/Modules/Helpdesk/Livewire/SettingsManager.php
+++ b/Modules/Helpdesk/Livewire/SettingsManager.php
@@ -199,6 +199,8 @@ final class SettingsManager extends Component
 
     public function saveCategory(): void
     {
+        $this->normalizeNullableFormValues('categoryForm', ['company_id']);
+
         $data = $this->validate([
             'categoryForm.company_id' => ['nullable', 'integer'],
             'categoryForm.name' => ['required', 'string', 'max:120'],
@@ -241,6 +243,8 @@ final class SettingsManager extends Component
 
     public function saveTeam(): void
     {
+        $this->normalizeNullableFormValues('teamForm', ['company_id']);
+
         $data = $this->validate([
             'teamForm.company_id' => ['nullable', 'integer'],
             'teamForm.name' => ['required', 'string', 'max:120'],
@@ -283,6 +287,8 @@ final class SettingsManager extends Component
 
     public function saveProject(): void
     {
+        $this->normalizeNullableFormValues('projectForm', ['company_id', 'team_id']);
+
         $data = $this->validate([
             'projectForm.company_id' => ['nullable', 'integer'],
             'projectForm.team_id' => ['nullable', 'integer', 'exists:helpdesk_teams,id'],
@@ -326,6 +332,8 @@ final class SettingsManager extends Component
 
     public function saveBoard(): void
     {
+        $this->normalizeNullableFormValues('boardForm', ['owner_id']);
+
         $data = $this->validate([
             'boardForm.name' => ['required', 'string', 'max:160'],
             'boardForm.slug' => ['nullable', 'string', 'max:180'],
@@ -391,6 +399,8 @@ final class SettingsManager extends Component
 
     public function saveRepository(): void
     {
+        $this->normalizeNullableFormValues('repositoryForm', ['company_id', 'project_id', 'webhook_secret']);
+
         $data = $this->validate([
             'repositoryForm.company_id' => ['nullable', 'integer'],
             'repositoryForm.project_id' => ['nullable', 'integer', 'exists:helpdesk_projects,id'],
@@ -427,6 +437,8 @@ final class SettingsManager extends Component
 
     public function saveWorkflowTemplate(): void
     {
+        $this->normalizeNullableFormValues('workflowForm', ['text_body', 'cc', 'bcc']);
+
         $data = $this->validate([
             'workflowForm.name' => ['required', 'string', 'max:160'],
             'workflowForm.event' => ['required', 'string', 'max:80'],
@@ -463,6 +475,8 @@ final class SettingsManager extends Component
 
     public function saveCannedResponse(): void
     {
+        $this->normalizeNullableFormValues('cannedForm', ['company_id', 'category_id', 'team_id', 'subject']);
+
         $data = $this->validate([
             'cannedForm.company_id' => ['nullable', 'integer'],
             'cannedForm.category_id' => ['nullable', 'integer', 'exists:helpdesk_categories,id'],
@@ -500,6 +514,8 @@ final class SettingsManager extends Component
 
     public function saveSlaPolicy(): void
     {
+        $this->normalizeNullableFormValues('slaForm', ['company_id', 'priority_id', 'category_id']);
+
         $data = $this->validate([
             'slaForm.company_id' => ['nullable', 'integer'],
             'slaForm.priority_id' => ['nullable', 'integer', 'exists:helpdesk_priorities,id'],
@@ -540,6 +556,8 @@ final class SettingsManager extends Component
 
     public function saveAutomationRule(): void
     {
+        $this->normalizeNullableFormValues('automationForm', ['company_id', 'match_sender', 'match_subject', 'match_mailbox', 'match_category_id', 'set_priority_id', 'set_category_id', 'set_team_id', 'set_project_id', 'set_status_id', 'set_agent_id']);
+
         $data = $this->validate([
             'automationForm.company_id' => ['nullable', 'integer'],
             'automationForm.name' => ['required', 'string', 'max:160'],
@@ -582,6 +600,8 @@ final class SettingsManager extends Component
 
     public function saveProduct(): void
     {
+        $this->normalizeNullableFormValues('productForm', ['company_id', 'version', 'release_channel', 'description']);
+
         $data = $this->validate([
             'productForm.company_id' => ['nullable', 'integer'],
             'productForm.name' => ['required', 'string', 'max:160'],
@@ -617,6 +637,8 @@ final class SettingsManager extends Component
 
     public function saveTag(): void
     {
+        $this->normalizeNullableFormValues('tagForm', ['company_id']);
+
         $data = $this->validate([
             'tagForm.company_id' => ['nullable', 'integer'],
             'tagForm.name' => ['required', 'string', 'max:80'],
@@ -648,6 +670,8 @@ final class SettingsManager extends Component
 
     public function saveChecklistTemplate(): void
     {
+        $this->normalizeNullableFormValues('checklistTemplateForm', ['company_id', 'category_id', 'project_id']);
+
         $data = $this->validate([
             'checklistTemplateForm.company_id' => ['nullable', 'integer'],
             'checklistTemplateForm.category_id' => ['nullable', 'integer', 'exists:helpdesk_categories,id'],
@@ -694,8 +718,10 @@ final class SettingsManager extends Component
             return;
         }
 
+        $this->normalizeNullableScalar('default_helpdesk_company_id');
+
         $this->validate([
-            'default_helpdesk_company_id' => ['nullable'],
+            'default_helpdesk_company_id' => ['nullable', 'integer', 'exists:companies,id'],
         ]);
 
         $companyId = filled($this->default_helpdesk_company_id)
@@ -796,6 +822,35 @@ final class SettingsManager extends Component
             ->get();
     }
 
+    /**
+     * Convert browser select empty strings into null before Livewire validation.
+     *
+     * Flux/select controls submit optional values as empty strings. Laravel's
+     * nullable integer and exists rules expect a real null, so normalising here
+     * keeps every settings CRUD form usable from the browser.
+     *
+     * @param  array<int, string>  $keys
+     */
+    private function normalizeNullableFormValues(string $formProperty, array $keys): void
+    {
+        foreach ($keys as $key) {
+            if (! array_key_exists($key, $this->{$formProperty})) {
+                continue;
+            }
+
+            if (blank($this->{$formProperty}[$key])) {
+                $this->{$formProperty}[$key] = null;
+            }
+        }
+    }
+
+    private function normalizeNullableScalar(string $property): void
+    {
+        if (blank($this->{$property})) {
+            $this->{$property} = null;
+        }
+    }
+
     /**
      * Remove is_default before save when the database has not been migrated yet.
      *
diff --git a/Modules/Helpdesk/Tests/Feature/SettingsCrudTest.php b/Modules/Helpdesk/Tests/Feature/SettingsCrudTest.php
index 3311229f..d0df55ab 100644
--- a/Modules/Helpdesk/Tests/Feature/SettingsCrudTest.php
+++ b/Modules/Helpdesk/Tests/Feature/SettingsCrudTest.php
@@ -9,6 +9,13 @@ use Livewire\Livewire;
 use Modules\Helpdesk\Livewire\SettingsManager;
 use Modules\Helpdesk\Models\Category;
 use Modules\Helpdesk\Models\GitRepository;
+use Modules\Helpdesk\Models\AutomationRule;
+use Modules\Helpdesk\Models\CannedResponse;
+use Modules\Helpdesk\Models\ChecklistTemplate;
+use Modules\Helpdesk\Models\KanbanBoard;
+use Modules\Helpdesk\Models\Product;
+use Modules\Helpdesk\Models\SlaPolicy;
+use Modules\Helpdesk\Models\Tag;
 use Modules\Helpdesk\Models\Priority;
 use Modules\Helpdesk\Models\Project;
 use Modules\Helpdesk\Models\Status;
@@ -95,6 +102,132 @@ final class SettingsCrudTest extends TestCase
         $this->assertDatabaseHas('helpdesk_workflow_templates', ['name' => 'Ticket Raised', 'event' => 'ticket.created']);
     }
 
+
+    public function test_settings_manager_creates_every_settings_record_with_browser_empty_select_values(): void
+    {
+        $admin = $this->admin();
+        $status = $this->ticketStatus(['name' => 'Triage', 'slug' => 'triage']);
+        $priority = $this->priority(['name' => 'Standard', 'slug' => 'standard']);
+        $category = $this->category(['name' => 'General', 'slug' => 'general']);
+        $team = $this->team(['name' => 'Support Desk', 'slug' => 'support-desk']);
+        $project = $this->project(['title' => 'Support Portal', 'slug' => 'support-portal']);
+
+        Livewire::actingAs($admin)
+            ->test(SettingsManager::class)
+            ->set('categoryForm.company_id', '')
+            ->set('categoryForm.name', 'Accounts')
+            ->set('categoryForm.color', 'blue')
+            ->call('saveCategory')
+            ->assertHasNoErrors()
+            ->set('teamForm.company_id', '')
+            ->set('teamForm.name', 'Accounts Team')
+            ->set('teamForm.color', 'indigo')
+            ->call('saveTeam')
+            ->assertHasNoErrors()
+            ->set('projectForm.company_id', '')
+            ->set('projectForm.team_id', '')
+            ->set('projectForm.title', 'Accounts Portal')
+            ->set('projectForm.color', 'blue')
+            ->call('saveProject')
+            ->assertHasNoErrors()
+            ->set('boardForm.name', 'Support Board')
+            ->set('boardForm.owner_id', '')
+            ->set('boardForm.status_ids', [$status->id])
+            ->call('saveBoard')
+            ->assertHasNoErrors()
+            ->set('repositoryForm.company_id', '')
+            ->set('repositoryForm.project_id', '')
+            ->set('repositoryForm.name', 'Support Repo')
+            ->set('repositoryForm.provider', 'github')
+            ->set('repositoryForm.remote_url', 'git@example.com:support/repo.git')
+            ->set('repositoryForm.default_branch', 'main')
+            ->set('repositoryForm.webhook_secret', '')
+            ->call('saveRepository')
+            ->assertHasNoErrors()
+            ->set('workflowForm.name', 'Updated')
+            ->set('workflowForm.event', 'ticket.updated')
+            ->set('workflowForm.subject', 'Updated {{ ticket.reference }}')
+            ->set('workflowForm.html_body', '<p>Updated</p>')
+            ->set('workflowForm.text_body', '')
+            ->set('workflowForm.cc', '')
+            ->set('workflowForm.bcc', '')
+            ->set('workflowForm.to_role', 'requester')
+            ->call('saveWorkflowTemplate')
+            ->assertHasNoErrors()
+            ->set('cannedForm.company_id', '')
+            ->set('cannedForm.category_id', '')
+            ->set('cannedForm.team_id', '')
+            ->set('cannedForm.name', 'Greeting')
+            ->set('cannedForm.visibility', 'agents')
+            ->set('cannedForm.subject', '')
+            ->set('cannedForm.body', 'Hello {{ requester.name }}')
+            ->call('saveCannedResponse')
+            ->assertHasNoErrors()
+            ->set('slaForm.company_id', '')
+            ->set('slaForm.priority_id', '')
+            ->set('slaForm.category_id', '')
+            ->set('slaForm.name', 'Standard SLA')
+            ->set('slaForm.first_response_minutes', 120)
+            ->set('slaForm.resolution_minutes', 1440)
+            ->call('saveSlaPolicy')
+            ->assertHasNoErrors()
+            ->set('automationForm.company_id', '')
+            ->set('automationForm.name', 'Route Accounts')
+            ->set('automationForm.match_sender', '')
+            ->set('automationForm.match_subject', '')
+            ->set('automationForm.match_mailbox', '')
+            ->set('automationForm.match_category_id', '')
+            ->set('automationForm.set_priority_id', $priority->id)
+            ->set('automationForm.set_category_id', $category->id)
+            ->set('automationForm.set_team_id', $team->id)
+            ->set('automationForm.set_project_id', $project->id)
+            ->set('automationForm.set_status_id', $status->id)
+            ->set('automationForm.set_agent_id', '')
+            ->call('saveAutomationRule')
+            ->assertHasNoErrors()
+            ->set('checklistTemplateForm.company_id', '')
+            ->set('checklistTemplateForm.category_id', '')
+            ->set('checklistTemplateForm.project_id', '')
+            ->set('checklistTemplateForm.name', 'Closure Checks')
+            ->set('checklistTemplateForm.items_text', "Confirm requester\nClose ticket")
+            ->call('saveChecklistTemplate')
+            ->assertHasNoErrors()
+            ->set('tagForm.company_id', '')
+            ->set('tagForm.name', 'Escalated')
+            ->set('tagForm.color', 'red')
+            ->call('saveTag')
+            ->assertHasNoErrors()
+            ->set('productForm.company_id', '')
+            ->set('productForm.name', 'WMS Support')
+            ->set('productForm.type', 'service')
+            ->set('productForm.version', '')
+            ->set('productForm.release_channel', '')
+            ->set('productForm.description', '')
+            ->call('saveProduct')
+            ->assertHasNoErrors();
+
+        $this->assertDatabaseHas('helpdesk_categories', ['slug' => 'accounts', 'company_id' => null]);
+        $this->assertDatabaseHas('helpdesk_teams', ['slug' => 'accounts-team', 'company_id' => null]);
+        $this->assertDatabaseHas('helpdesk_projects', ['slug' => 'accounts-portal', 'company_id' => null, 'team_id' => null]);
+        $this->assertDatabaseHas('helpdesk_kanban_boards', ['slug' => 'support-board', 'owner_id' => null]);
+        $this->assertDatabaseHas('helpdesk_git_repositories', ['name' => 'Support Repo', 'project_id' => null, 'webhook_secret' => null]);
+        $this->assertDatabaseHas('helpdesk_workflow_templates', ['name' => 'Updated', 'text_body' => null, 'cc' => null, 'bcc' => null]);
+        $this->assertDatabaseHas('helpdesk_canned_responses', ['slug' => 'greeting', 'category_id' => null, 'team_id' => null]);
+        $this->assertDatabaseHas('helpdesk_sla_policies', ['slug' => 'standard-sla', 'priority_id' => null, 'category_id' => null]);
+        $this->assertDatabaseHas('helpdesk_automation_rules', ['slug' => 'route-accounts', 'set_agent_id' => null]);
+        $this->assertDatabaseHas('helpdesk_checklist_templates', ['slug' => 'closure-checks', 'category_id' => null, 'project_id' => null]);
+        $this->assertDatabaseHas('helpdesk_tags', ['slug' => 'escalated', 'company_id' => null]);
+        $this->assertDatabaseHas('helpdesk_products', ['slug' => 'wms-support', 'company_id' => null]);
+
+        self::assertTrue(KanbanBoard::query()->where('slug', 'support-board')->firstOrFail()->statuses()->whereKey($status->id)->exists());
+        self::assertNotNull(CannedResponse::query()->where('slug', 'greeting')->first());
+        self::assertNotNull(SlaPolicy::query()->where('slug', 'standard-sla')->first());
+        self::assertNotNull(AutomationRule::query()->where('slug', 'route-accounts')->first());
+        self::assertNotNull(ChecklistTemplate::query()->where('slug', 'closure-checks')->first());
+        self::assertNotNull(Tag::query()->where('slug', 'escalated')->first());
+        self::assertNotNull(Product::query()->where('slug', 'wms-support')->first());
+    }
+
     public function test_settings_manager_can_edit_and_delete_all_new_setup_records(): void
     {
         $admin = $this->admin();
diff --git a/Modules/Helpdesk/changelog.yaml b/Modules/Helpdesk/changelog.yaml
index e0b96af4..cd94c771 100644
--- a/Modules/Helpdesk/changelog.yaml
+++ b/Modules/Helpdesk/changelog.yaml
@@ -393,3 +393,12 @@ versions:
   changed:
     - Removed the extra visible plus character from Helpdesk New Ticket action labels while keeping the icon-only plus indicator.
     - Kept module.json version in sync with changelog.yaml.
+
+- version: 1.9.27
+  date: 2026-06-18
+  changed:
+    - Fixed Helpdesk settings CRUD forms by normalising optional browser select values before Livewire validation.
+    - Hardened optional nullable fields across categories, teams, projects, boards, Git repositories, workflow templates, canned responses, SLA policies, automation rules, checklists, tags, products and default company selection.
+    - Added feature coverage proving every Helpdesk settings area can create records when optional select controls submit empty browser values.
+    - Kept module.json version in sync with changelog.yaml.
+
diff --git a/Modules/Helpdesk/module.json b/Modules/Helpdesk/module.json
index 06d58e3e..1eaf7c35 100644
--- a/Modules/Helpdesk/module.json
+++ b/Modules/Helpdesk/module.json
@@ -22,5 +22,5 @@
         "Modules\\Helpdesk\\Providers\\HelpdeskServiceProvider"
     ],
     "files": [],
-    "version": "1.9.26"
+    "version": "1.9.27"
 }