diff --git a/BE/apps/api-server/src/modules/mindmap/mindmap.service.ts b/BE/apps/api-server/src/modules/mindmap/mindmap.service.ts
index e71d3d60..ecd5f28d 100644
--- a/BE/apps/api-server/src/modules/mindmap/mindmap.service.ts
+++ b/BE/apps/api-server/src/modules/mindmap/mindmap.service.ts
@@ -95,14 +95,6 @@ export class MindmapService {
       throw new MindmapException('마인드맵을 찾을 수 없습니다.');
     }
 
-    if (!nodes) {
-      return {
-        title: mindmap.title,
-        content: mindmap.content,
-        aiCount: mindmap.aiCount,
-        connectionId: mindmap.connectionId,
-      };
-    }
     return {
       title: mindmap.title,
       content: mindmap.content,
diff --git a/BE/libs/entity/src/mindmap.entity.ts b/BE/libs/entity/src/mindmap.entity.ts
index 97516ac7..d70a7273 100644
--- a/BE/libs/entity/src/mindmap.entity.ts
+++ b/BE/libs/entity/src/mindmap.entity.ts
@@ -28,13 +28,19 @@ export class Mindmap {
   @Column({ name: 'ai_count', default: 5 })
   aiCount: number;
 
-  @OneToMany(() => UserMindmapRole, (userMindmapRole) => userMindmapRole.mindmap)
+  @OneToMany(() => UserMindmapRole, (userMindmapRole) => userMindmapRole.mindmap, {
+    cascade: true,
+    onDelete: 'CASCADE',
+  })
   userMindmapRoles: UserMindmapRole[];
 
   @Column({ name: 'connection_id' })
   connectionId: string;
 
-  @OneToMany(() => Node, (node) => node.mindmap)
+  @OneToMany(() => Node, (node) => node.mindmap, {
+    cascade: true,
+    onDelete: 'CASCADE',
+  })
   nodes: Node[];
 
   @CreateDateColumn({ type: 'timestamp', name: 'create_date' })
diff --git a/BE/libs/entity/src/node.entity.ts b/BE/libs/entity/src/node.entity.ts
index 5414c87f..f295af2b 100644
--- a/BE/libs/entity/src/node.entity.ts
+++ b/BE/libs/entity/src/node.entity.ts
@@ -19,7 +19,7 @@ export class Node {
   @PrimaryGeneratedColumn()
   id: number;
 
-  @Column({ type: 'varchar', length: 32 })
+  @Column({ type: 'varchar', length: 128 })
   keyword: string;
 
   @Column({ name: 'location_x', type: 'float', default: 0 })
diff --git a/BE/libs/entity/src/user.entity.ts b/BE/libs/entity/src/user.entity.ts
index 736b7ce7..cc9ef5cd 100644
--- a/BE/libs/entity/src/user.entity.ts
+++ b/BE/libs/entity/src/user.entity.ts
@@ -18,6 +18,9 @@ export class User {
   @CreateDateColumn({ type: 'timestamp', name: 'create_date' })
   createDate: Date;
 
-  @OneToMany(() => UserMindmapRole, (userMindmapRole) => userMindmapRole.user)
+  @OneToMany(() => UserMindmapRole, (userMindmapRole) => userMindmapRole.user, {
+    cascade: true,
+    onDelete: 'CASCADE',
+  })
   userMindmapRoles: UserMindmapRole[];
 }
diff --git a/BE/libs/entity/src/user.mindmap.role.ts b/BE/libs/entity/src/user.mindmap.role.ts
index f5e17f35..19ffce12 100644
--- a/BE/libs/entity/src/user.mindmap.role.ts
+++ b/BE/libs/entity/src/user.mindmap.role.ts
@@ -8,11 +8,11 @@ export class UserMindmapRole {
   @PrimaryGeneratedColumn()
   id: number;
 
-  @ManyToOne(() => User, (user) => user.userMindmapRoles, { onDelete: 'CASCADE', nullable: false })
+  @ManyToOne(() => User, (user) => user.userMindmapRoles, { nullable: false })
   @JoinColumn({ name: 'user_id' })
   user: User;
 
-  @ManyToOne(() => Mindmap, (mindmap) => mindmap.userMindmapRoles, { onDelete: 'CASCADE', nullable: false })
+  @ManyToOne(() => Mindmap, (mindmap) => mindmap.userMindmapRoles, { nullable: false })
   @JoinColumn({ name: 'mindmap_id' })
   mindmap: Mindmap;
 
@@ -20,5 +20,5 @@ export class UserMindmapRole {
   role: Role;
 
   @DeleteDateColumn()
-  deleteAt: Date | null;
+  deletedAt: Date | null;
 }