diff --git a/app/Http/Controllers/Users/UserFilesController.php b/app/Http/Controllers/Users/UserFilesController.php
index f5a3ea1180..61a195012a 100644
--- a/app/Http/Controllers/Users/UserFilesController.php
+++ b/app/Http/Controllers/Users/UserFilesController.php
@@ -33,6 +33,10 @@ class UserFilesController extends Controller
 
             $logActions = [];
             $files = $request->file('file');
+
+            if (is_null($files)){
+                return redirect()->back()->with('error', trans('admin/users/message.upload.nofiles'));
+            }
             foreach($files as $file) {
                 $extension = $file->getClientOriginalExtension();
                 $filename = 'user-' . $user->id . '-' . str_random(8);
diff --git a/database/migrations/2021_06_07_155421_add_serial_number_indexes.php b/database/migrations/2021_06_07_155421_add_serial_number_indexes.php
new file mode 100644
index 0000000000..3673489c7e
--- /dev/null
+++ b/database/migrations/2021_06_07_155421_add_serial_number_indexes.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddSerialNumberIndexes extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            $table->index(['serial']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('assets', function (Blueprint $table) {
+            $table->dropIndex(['serial']);
+        });
+    }
+}
diff --git a/database/migrations/2021_06_07_155436_add_company_id_indexes.php b/database/migrations/2021_06_07_155436_add_company_id_indexes.php
new file mode 100644
index 0000000000..f4a83800cd
--- /dev/null
+++ b/database/migrations/2021_06_07_155436_add_company_id_indexes.php
@@ -0,0 +1,88 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddCompanyIdIndexes extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('accessories', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('action_logs', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('assets', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('components', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('consumables', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('departments', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('licenses', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+
+        Schema::table('users', function (Blueprint $table) {
+            $table->index(['company_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('licenses', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('departments', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('consumables', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('components', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('assets', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('action_logs', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+
+        Schema::table('accessories', function (Blueprint $table) {
+            $table->dropIndex(['company_id']);
+        });
+    }
+}
diff --git a/resources/views/modals/upload-file.blade.php b/resources/views/modals/upload-file.blade.php
index a5ee373cbb..f2910967b9 100644
--- a/resources/views/modals/upload-file.blade.php
+++ b/resources/views/modals/upload-file.blade.php
@@ -19,7 +19,7 @@
 
                         <label class="btn btn-default">
                             {{ trans('button.select_file')  }}
-                            <input type="file" name="file[]" multiple="true" class="js-uploadFile" id="uploadFile" data-maxsize="{{ \App\Helpers\Helper::file_upload_max_size() }}" accept="image/*,.csv,.zip,.rar,.doc,.docx,.xls,.xlsx,.xml,.lic,.xlsx,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel,text/plain,.pdf,application/rtf" style="display:none">
+                            <input type="file" name="file[]" multiple="true" class="js-uploadFile" id="uploadFile" data-maxsize="{{ \App\Helpers\Helper::file_upload_max_size() }}" accept="image/*,.csv,.zip,.rar,.doc,.docx,.xls,.xlsx,.xml,.lic,.xlsx,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel,text/plain,.pdf,application/rtf" style="display:none" required>
                         </label>
 
                     </div>