diff --git a/src/main/db/migrations/0001-add_col.ts b/src/main/db/migrations/0001-add_col.ts
index 6db84d8..3121cab 100644
--- a/src/main/db/migrations/0001-add_col.ts
+++ b/src/main/db/migrations/0001-add_col.ts
@@ -1,14 +1,20 @@
 import { DataTypes, QueryInterface } from 'sequelize'
+import log from 'electron-log'
 
 export const migration0001 = {
   name: '0001-add_notes_column_to_entry',
   up: async ({ context }: { context: QueryInterface }): Promise<void> => {
-    await context.addColumn('entry', 'notes', {
-      type: DataTypes.STRING,
-      allowNull: true
+    await context.describeTable('entry').then(async (value) => {
+      if (value.notes) {
+        log.info('notes column is already exists')
+        return Promise.resolve()
+      }
+
+      await context.addColumn('entry', 'notes', {
+        type: DataTypes.STRING,
+        allowNull: true
+      })
     })
   },
-  down: async ({ context }): Promise<void> => {
-    await context.removeColumn('entry', 'notes')
-  }
+  down: async (): Promise<void> => {}
 }
diff --git a/src/main/db/seed.ts b/src/main/db/seed.ts
index 3d48878..c5a0e3a 100644
--- a/src/main/db/seed.ts
+++ b/src/main/db/seed.ts
@@ -31,7 +31,6 @@ export const seed = async (db: Sequelize): Promise<void> => {
         defaultValue: DataTypes.UUIDV4,
         primaryKey: true
       },
-
       date: {
         type: DataTypes.DATE,
         allowNull: false
@@ -44,8 +43,15 @@ export const seed = async (db: Sequelize): Promise<void> => {
     { sequelize: db, tableName: 'entry_timelog', freezeTableName: true, modelName: 'entry_timelog' }
   )
 
-  Entry.hasMany(EntryTimelog, { foreignKey: 'entry_id', as: 'timelogs' })
-  EntryTimelog.belongsTo(Entry, { foreignKey: 'entry_id' })
+  Entry.hasMany(EntryTimelog, {
+    as: 'timelogs',
+    onDelete: 'CASCADE',
+    hooks: true,
+    foreignKey: 'entry_id'
+  })
+  EntryTimelog.belongsTo(Entry, {
+    foreignKey: 'entry_id'
+  })
 
   Todo.init(
     {
diff --git a/src/main/db/types/Entry.ts b/src/main/db/types/Entry.ts
index f05a929..c87e6e9 100644
--- a/src/main/db/types/Entry.ts
+++ b/src/main/db/types/Entry.ts
@@ -1,17 +1,12 @@
 import { BaseDO, BaseEntity } from './BaseEntity'
-import { Association, HasManyCreateAssociationMixin, NonAttribute } from 'sequelize'
+import { NonAttribute } from 'sequelize'
 import { EntryTimelog, EntryTimelogDO } from './EntryTimelog'
 
 export class Entry extends BaseEntity<Entry> {
   declare label: string
   declare notes?: string
 
-  declare createTimelog: HasManyCreateAssociationMixin<EntryTimelog, 'entry_id'>
   declare timelogs?: NonAttribute<EntryTimelog[]>
-
-  declare static associations: {
-    timelogs: Association<Entry, EntryTimelog>
-  }
 }
 
 export interface EntryDO extends BaseDO {
diff --git a/src/main/db/types/EntryTimelog.ts b/src/main/db/types/EntryTimelog.ts
index 02b34d0..4fc5fff 100644
--- a/src/main/db/types/EntryTimelog.ts
+++ b/src/main/db/types/EntryTimelog.ts
@@ -1,5 +1,5 @@
 import { BaseDO, BaseEntity } from './BaseEntity'
-import { Association, ForeignKey, HasManyGetAssociationsMixin, NonAttribute } from 'sequelize'
+import { ForeignKey, NonAttribute } from 'sequelize'
 import { Entry } from './Entry'
 
 export class EntryTimelog extends BaseEntity<EntryTimelog> {
@@ -7,12 +7,7 @@ export class EntryTimelog extends BaseEntity<EntryTimelog> {
   declare duration: number
   declare entry_id: ForeignKey<Entry['id']>
 
-  declare getEntry: HasManyGetAssociationsMixin<Entry>
   declare entry?: NonAttribute<Entry>
-
-  declare static associations: {
-    entry: Association<Entry, EntryTimelog>
-  }
 }
 
 export interface EntryTimelogDO extends BaseDO {