diff --git a/database/migrations/2026_06_11_071431_add_semester_to_student_class_table.php b/database/migrations/2026_06_11_071431_add_semester_to_student_class_table.php
index 6589bb92..be3382c8 100644
--- a/database/migrations/2026_06_11_071431_add_semester_to_student_class_table.php
+++ b/database/migrations/2026_06_11_071431_add_semester_to_student_class_table.php
@@ -11,6 +11,9 @@ return new class extends Migration
      */
     public function up(): void
     {
+        if (Schema::hasColumn('student_class', 'semester')) {
+            return;
+        }
         Schema::table('student_class', function (Blueprint $table) {
             $table->string('semester', 255)->default('')->after('is_event_only');
         });
diff --git a/database/migrations/2026_06_11_074642_add_inventory_item_id_to_purchase_order_items.php b/database/migrations/2026_06_11_074642_add_inventory_item_id_to_purchase_order_items.php
index 9fe09787..f76723d5 100644
--- a/database/migrations/2026_06_11_074642_add_inventory_item_id_to_purchase_order_items.php
+++ b/database/migrations/2026_06_11_074642_add_inventory_item_id_to_purchase_order_items.php
@@ -18,9 +18,10 @@ return new class extends Migration
             }
         });
 
-        // Add index if it doesn't exist
-        $indexExists = DB::select("SHOW INDEX FROM purchase_order_items WHERE Key_name = 'po_items_inventory_item_idx'");
-        if (empty($indexExists)) {
+        // Add index if it doesn't exist (SQLite-compatible check)
+        $schema = DB::connection()->getDoctrineSchemaManager();
+        $indexes = $schema->listTableIndexes('purchase_order_items');
+        if (! isset($indexes['po_items_inventory_item_idx'])) {
             Schema::table('purchase_order_items', function (Blueprint $table) {
                 $table->index('inventory_item_id', 'po_items_inventory_item_idx');
             });