diff --git a/system1-factory/api/db/migrations/20260317100000_create_schedule_meeting_system.js b/system1-factory/api/db/migrations/20260317100000_create_schedule_meeting_system.js
index f5cde46..c94afc4 100644
--- a/system1-factory/api/db/migrations/20260317100000_create_schedule_meeting_system.js
+++ b/system1-factory/api/db/migrations/20260317100000_create_schedule_meeting_system.js
@@ -30,7 +30,7 @@ exports.up = async (knex) => {
   // 3. 공정표 항목
   await knex.schema.createTable('schedule_entries', (table) => {
     table.increments('entry_id').primary();
-    table.integer('project_id').unsigned().notNullable()
+    table.integer('project_id').notNullable()
       .references('project_id').inTable('projects');
     table.integer('phase_id').unsigned().notNullable()
       .references('phase_id').inTable('schedule_phases');
@@ -42,7 +42,7 @@ exports.up = async (knex) => {
     table.string('assignee', 100).nullable();
     table.text('notes').nullable();
     table.integer('display_order').defaultTo(0);
-    table.integer('created_by').unsigned().nullable()
+    table.integer('created_by').nullable()
       .references('user_id').inTable('sso_users');
     table.timestamp('created_at').defaultTo(knex.fn.now());
     table.timestamp('updated_at').defaultTo(knex.fn.now());
@@ -61,7 +61,7 @@ exports.up = async (knex) => {
   // 5. 마일스톤
   await knex.schema.createTable('schedule_milestones', (table) => {
     table.increments('milestone_id').primary();
-    table.integer('project_id').unsigned().notNullable()
+    table.integer('project_id').notNullable()
       .references('project_id').inTable('projects');
     table.integer('entry_id').unsigned().nullable()
       .references('entry_id').inTable('schedule_entries').onDelete('SET NULL');
@@ -70,7 +70,7 @@ exports.up = async (knex) => {
     table.string('milestone_type', 30).defaultTo('deadline');
     table.string('status', 20).defaultTo('upcoming');
     table.text('notes').nullable();
-    table.integer('created_by').unsigned().nullable()
+    table.integer('created_by').nullable()
       .references('user_id').inTable('sso_users');
     table.timestamp('created_at').defaultTo(knex.fn.now());
     table.timestamp('updated_at').defaultTo(knex.fn.now());
@@ -85,7 +85,7 @@ exports.up = async (knex) => {
     table.string('location', 200).nullable();
     table.text('summary').nullable();
     table.string('status', 20).defaultTo('draft');
-    table.integer('created_by').unsigned().nullable()
+    table.integer('created_by').nullable()
       .references('user_id').inTable('sso_users');
     table.timestamp('created_at').defaultTo(knex.fn.now());
     table.timestamp('updated_at').defaultTo(knex.fn.now());
@@ -96,7 +96,7 @@ exports.up = async (knex) => {
     table.increments('id').primary();
     table.integer('meeting_id').unsigned().notNullable()
       .references('meeting_id').inTable('meeting_minutes').onDelete('CASCADE');
-    table.integer('user_id').unsigned().notNullable()
+    table.integer('user_id').notNullable()
       .references('user_id').inTable('sso_users');
     table.unique(['meeting_id', 'user_id']);
   });
@@ -106,7 +106,7 @@ exports.up = async (knex) => {
     table.increments('item_id').primary();
     table.integer('meeting_id').unsigned().notNullable()
       .references('meeting_id').inTable('meeting_minutes').onDelete('CASCADE');
-    table.integer('project_id').unsigned().nullable()
+    table.integer('project_id').nullable()
       .references('project_id').inTable('projects');
     table.integer('milestone_id').unsigned().nullable()
       .references('milestone_id').inTable('schedule_milestones').onDelete('SET NULL');
@@ -114,7 +114,7 @@ exports.up = async (knex) => {
     table.text('content').notNullable();
     table.text('decision').nullable();
     table.text('action_required').nullable();
-    table.integer('responsible_user_id').unsigned().nullable()
+    table.integer('responsible_user_id').nullable()
       .references('user_id').inTable('sso_users');
     table.date('due_date').nullable();
     table.string('status', 20).defaultTo('open');