diff --git a/backend/db/implementation/SqlGroupDAO.py b/backend/db/implementation/SqlGroupDAO.py
index d26113ff..115d99d7 100644
--- a/backend/db/implementation/SqlGroupDAO.py
+++ b/backend/db/implementation/SqlGroupDAO.py
@@ -12,7 +12,7 @@ def create_group(self, project_id: int) -> GroupDataclass:
         if not project:
             msg = f"Project with id {project} not found"
             raise ItemNotFoundError(msg)
-        new_group: Group = Group(project_id=project_id, project=project)
+        new_group: Group = Group(project_id=project_id)
         db.session.add(new_group)
         db.session.commit()
         return new_group.to_domain_model()
diff --git a/backend/db/implementation/SqlProjectDAO.py b/backend/db/implementation/SqlProjectDAO.py
index d92b350a..6f2bd059 100644
--- a/backend/db/implementation/SqlProjectDAO.py
+++ b/backend/db/implementation/SqlProjectDAO.py
@@ -15,7 +15,7 @@ def create_project(self, subject_id: int, name: str, deadline: datetime, archive
             msg = f"Subject with id {subject_id} not found"
             raise ItemNotFoundError(msg)
 
-        new_project: Project = Project(subject_id=subject_id, subject=subject, name=name, deadline=deadline,
+        new_project: Project = Project(subject_id=subject_id, name=name, deadline=deadline,
                                        archived=archived, requirements=requirements, visible=visible,
                                        max_students=max_students)
 
diff --git a/backend/db/implementation/SqlSubmissionDAO.py b/backend/db/implementation/SqlSubmissionDAO.py
index 3ae862dd..51a101b5 100644
--- a/backend/db/implementation/SqlSubmissionDAO.py
+++ b/backend/db/implementation/SqlSubmissionDAO.py
@@ -19,7 +19,7 @@ def create_submission(self, student_id: int, group_id: int, message: str,state:
         if not group:
             msg = f"Group with id {group_id} not found"
             raise ItemNotFoundError(msg)
-        new_submission: Submission = Submission(student=student, group=group, student_id=student_id,
+        new_submission: Submission = Submission(student_id=student_id,
                                                 group_id=group_id, message=message, state=state, date_time=date_time)
         db.session.add(new_submission)
         db.session.commit()