Fix migration for duplicate column, fixes #202

backend/migrations/20250716085710-add-parent-task-id-to-tasks.js

@@ -1,20 +1,27 @@
 'use strict';
 
+const { safeAddColumns, safeAddIndex } = require('../utils/migration-utils');
+
 /** @type {import('sequelize-cli').Migration} */
 module.exports = {
     async up(queryInterface, Sequelize) {
-        await queryInterface.addColumn('tasks', 'parent_task_id', {
-            type: Sequelize.INTEGER,
-            allowNull: true,
-            references: {
-                model: 'tasks',
-                key: 'id',
+        await safeAddColumns(queryInterface, 'tasks', [
+            {
+                name: 'parent_task_id',
+                definition: {
+                    type: Sequelize.INTEGER,
+                    allowNull: true,
+                    references: {
+                        model: 'tasks',
+                        key: 'id',
+                    },
+                    onUpdate: 'CASCADE',
+                    onDelete: 'CASCADE',
+                },
             },
-            onUpdate: 'CASCADE',
-            onDelete: 'CASCADE',
-        });
+        ]);
 
-        await queryInterface.addIndex('tasks', ['parent_task_id']);
+        await safeAddIndex(queryInterface, 'tasks', ['parent_task_id']);
     },
 
     async down(queryInterface) {