diff --git a/src/entity/hrms/hrms_leave.ts b/src/entity/hrms/hrms_leave.ts
index b20024a..928abd1 100644
--- a/src/entity/hrms/hrms_leave.ts
+++ b/src/entity/hrms/hrms_leave.ts
@@ -20,12 +20,12 @@ export class HrmsLeave {
   @PrimaryGeneratedColumn("uuid")
   id: string;
 
-  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "employee_id" })
+  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   employee: HrmsEmployee;
 
-  @ManyToOne(() => HrmsLeaveType, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "leave_type_id" })
+  @ManyToOne(() => HrmsLeaveType, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   leave_type: HrmsLeaveType;
 
   @Column({ type: "date", nullable: false })
diff --git a/src/entity/hrms/hrms_leave_approval.ts b/src/entity/hrms/hrms_leave_approval.ts
index 9c4110d..30b15ed 100644
--- a/src/entity/hrms/hrms_leave_approval.ts
+++ b/src/entity/hrms/hrms_leave_approval.ts
@@ -26,8 +26,8 @@ export class HrmsLeaveApproval {
   @PrimaryGeneratedColumn("uuid")
   id: string;
 
-  @ManyToOne(() => HrmsLeave, leave => leave.approvals, { onDelete: "CASCADE", nullable: false })
-  @JoinColumn({ name: "leave_id" })
+  @ManyToOne(() => HrmsLeave, leave => leave.approvals, { onDelete: "CASCADE", nullable: true })
+  @JoinColumn()
   leave: HrmsLeave;
 
   @Column({
@@ -37,8 +37,8 @@ export class HrmsLeaveApproval {
   })
   approval_type: ApprovalType;
 
-  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "approver_id" })
+  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   approver: HrmsEmployee;
 
   @Column({
diff --git a/src/entity/hrms/hrms_leave_document.ts b/src/entity/hrms/hrms_leave_document.ts
index 70cfc99..9d0c2da 100644
--- a/src/entity/hrms/hrms_leave_document.ts
+++ b/src/entity/hrms/hrms_leave_document.ts
@@ -13,8 +13,8 @@ export class HrmsLeaveDocument {
   @PrimaryGeneratedColumn("uuid")
   id: string;
 
-  @ManyToOne(() => HrmsLeave, leave => leave.documents, { onDelete: "CASCADE", nullable: false })
-  @JoinColumn({ name: "leave_id" })
+  @ManyToOne(() => HrmsLeave, leave => leave.documents, { onDelete: "CASCADE", nullable: true })
+  @JoinColumn()
   leave: HrmsLeave;
 
   @Column({ length: 256, nullable: false })
diff --git a/src/entity/hrms/hrms_payroll.ts b/src/entity/hrms/hrms_payroll.ts
index 2c6f454..a03a71e 100644
--- a/src/entity/hrms/hrms_payroll.ts
+++ b/src/entity/hrms/hrms_payroll.ts
@@ -17,12 +17,12 @@ export class HrmsPayroll {
   @PrimaryGeneratedColumn("uuid")
   id: string;
 
-  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "employee_id" })
+  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   employee: HrmsEmployee;
 
-  @ManyToOne(() => HrmsBank, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "bank_id" })
+  @ManyToOne(() => HrmsBank, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   bank: HrmsBank;
 
   @Column({ length: 128, nullable: false })
diff --git a/src/entity/hrms/hrms_payroll_monthly.ts b/src/entity/hrms/hrms_payroll_monthly.ts
index 4107c5d..2d2aa60 100644
--- a/src/entity/hrms/hrms_payroll_monthly.ts
+++ b/src/entity/hrms/hrms_payroll_monthly.ts
@@ -19,12 +19,12 @@ export class HrmsPayrollMonthly {
   @PrimaryGeneratedColumn("uuid")
   id: string;
 
-  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: false })
-  @JoinColumn({ name: "employee_id" })
+  @ManyToOne(() => HrmsEmployee, { onDelete: "RESTRICT", nullable: true })
+  @JoinColumn()
   employee: HrmsEmployee;
 
   @ManyToOne(() => HrmsPayroll, { onDelete: "RESTRICT", nullable: true })
-  @JoinColumn({ name: "payroll_setup_id" })
+  @JoinColumn()
   payroll_setup: HrmsPayroll;
 
   @Column({ type: "int", nullable: false })
diff --git a/src/entity/hrms/hrms_position.ts b/src/entity/hrms/hrms_position.ts
index 367bc2f..a33a2ac 100644
--- a/src/entity/hrms/hrms_position.ts
+++ b/src/entity/hrms/hrms_position.ts
@@ -29,24 +29,24 @@ export class HrmsPosition {
     description: string;
 
     @ManyToOne(() => HrmsDepartment, {
-        nullable: false,
+        nullable: true,
         onDelete: "RESTRICT"
     })
-    @JoinColumn({ name: "department_id" })
+    @JoinColumn()
     department: HrmsDepartment;
 
     @ManyToOne(() => HrmsPosition, position => position.children, {
         nullable: true,
         onDelete: "SET NULL"
     })
-    @JoinColumn({ name: "parent_id" })
+    @JoinColumn()
     parent: HrmsPosition;
 
     @OneToMany(() => HrmsPosition, position => position.parent)
     children: HrmsPosition[];
 
     @Column({
-        nullable: false,
+        nullable: true,
         length: 64
     })
     status: Status;