1 files changed, 1 insertions, 1 deletions
diff --git a/database/migrations/create_scorm_tables.php.stub b/database/migrations/create_scorm_tables.php.stub
index cc9dc38..496aca4 100644
--- a/database/migrations/create_scorm_tables.php.stub
+++ b/database/migrations/create_scorm_tables.php.stub
@@ -22,7 +22,7 @@ class CreateScormTables extends Migration
         // scorm_model
         Schema::create($tableNames['scorm_table'], function (Blueprint $table) {
             $table->bigIncrements('id');
-            $table->morphs('resource');
+            $table->nullableMorphs('resource');
             $table->string('title');
             $table->string('origin_file')->nullable();
             $table->string('version');