diff --git a/backend/src/controllers/students.ts b/backend/src/controllers/students.ts
index 48120db6..51488a2a 100644
--- a/backend/src/controllers/students.ts
+++ b/backend/src/controllers/students.ts
@@ -1,7 +1,7 @@
 import { Request, Response } from 'express';
 import {
     createClassJoinRequest,
-    createOrUpdateStudent,
+    createStudent,
     deleteClassJoinRequest,
     deleteStudent,
     getAllStudents,
@@ -42,7 +42,7 @@ export async function createStudentHandler(req: Request, res: Response): Promise
 
     const userData = req.body as StudentDTO;
 
-    const student = await createOrUpdateStudent(userData);
+    const student = await createStudent(userData);
     res.json({ student });
 }
 
diff --git a/backend/src/services/students.ts b/backend/src/services/students.ts
index 8841f8a7..7a95cecd 100644
--- a/backend/src/services/students.ts
+++ b/backend/src/services/students.ts
@@ -62,7 +62,7 @@ export async function createStudent(userData: StudentDTO): Promise<StudentDTO> {
     const studentRepository = getStudentRepository();
 
     const newStudent = mapToStudent(userData);
-    await studentRepository.save(newStudent);
+    await studentRepository.save(newStudent, { preventOverwrite: true });
 
     return userData;
 }
diff --git a/backend/src/services/teachers.ts b/backend/src/services/teachers.ts
index da837cf8..46c25e38 100644
--- a/backend/src/services/teachers.ts
+++ b/backend/src/services/teachers.ts
@@ -61,7 +61,7 @@ export async function createTeacher(userData: TeacherDTO): Promise<TeacherDTO> {
     const teacherRepository: TeacherRepository = getTeacherRepository();
 
     const newTeacher = mapToTeacher(userData);
-    await teacherRepository.save(newTeacher);
+    await teacherRepository.save(newTeacher, { preventOverwrite: true });
 
     return mapToTeacherDTO(newTeacher);
 }