diff --git a/BE/src/diaries/diaries.entity.ts b/BE/src/diaries/diaries.entity.ts
index 1f54bf3..c0eda9b 100644
--- a/BE/src/diaries/diaries.entity.ts
+++ b/BE/src/diaries/diaries.entity.ts
@@ -10,6 +10,7 @@ import {
   Generated,
   ManyToMany,
   JoinTable,
+  Unique,
 } from "typeorm";
 import { User } from "src/users/users.entity";
 import { Shape } from "src/shapes/shapes.entity";
@@ -17,6 +18,7 @@ import { sentimentStatus } from "src/utils/enum";
 import { Tag } from "src/tags/tags.entity";
 
 @Entity()
+@Unique(["uuid"])
 export class Diary extends BaseEntity {
   @PrimaryGeneratedColumn()
   id: number;
diff --git a/BE/src/shapes/shapes.entity.ts b/BE/src/shapes/shapes.entity.ts
index 97408eb..e9d9309 100644
--- a/BE/src/shapes/shapes.entity.ts
+++ b/BE/src/shapes/shapes.entity.ts
@@ -6,11 +6,13 @@ import {
   ManyToOne,
   Generated,
   OneToMany,
+  Unique,
 } from "typeorm";
 import { User } from "src/users/users.entity";
 import { Diary } from "src/diaries/diaries.entity";
 
 @Entity()
+@Unique(["uuid"])
 export class Shape extends BaseEntity {
   @PrimaryGeneratedColumn()
   id: number;
diff --git a/BE/src/users/users.entity.ts b/BE/src/users/users.entity.ts
index 0cccb11..ccdbd71 100644
--- a/BE/src/users/users.entity.ts
+++ b/BE/src/users/users.entity.ts
@@ -7,20 +7,22 @@ import {
   DeleteDateColumn,
   BaseEntity,
   OneToMany,
+  Unique,
 } from "typeorm";
 import { premiumStatus } from "src/utils/enum";
 import { Diary } from "../diaries/diaries.entity";
 import { Shape } from "src/shapes/shapes.entity";
 
 @Entity()
+@Unique(["userId", "email"])
 export class User extends BaseEntity {
   @PrimaryGeneratedColumn()
   id: number;
 
-  @Column({ length: 20, unique: true })
+  @Column({ length: 20 })
   userId: string;
 
-  @Column({ unique: true })
+  @Column()
   email: string;
 
   @Column({ length: 60 })