diff --git a/Makefile b/Makefile
index c6a2d1c..8a826f9 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,10 @@ format:
 	autoflake -r --in-place --remove-all-unused-imports ./rating_api
 	isort ./rating_api
 	black ./rating_api
-
+	autoflake -r --in-place --remove-all-unused-imports ./migrations
+	isort ./migrations
+	black ./migrations
+	
 db:
 	docker run -d -p 5432:5432 -e POSTGRES_HOST_AUTH_METHOD=trust --name db-rating_api postgres:15
 
diff --git a/migrations/versions/20181e0d6aab_make_nullable_timetable_id.py b/migrations/versions/20181e0d6aab_make_nullable_timetable_id.py
new file mode 100644
index 0000000..efdfd17
--- /dev/null
+++ b/migrations/versions/20181e0d6aab_make_nullable_timetable_id.py
@@ -0,0 +1,24 @@
+"""make nullable timetable_id
+
+Revision ID: 20181e0d6aab
+Revises: edcc1a448ffb
+Create Date: 2024-11-30 18:45:08.527638
+
+"""
+
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = '20181e0d6aab'
+down_revision = 'edcc1a448ffb'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_constraint('lecturer_timetable_id_key', 'lecturer', type_='unique')
+
+
+def downgrade():
+    op.create_unique_constraint('lecturer_timetable_id_key', 'lecturer', ['timetable_id'])
diff --git a/rating_api/models/db.py b/rating_api/models/db.py
index 1c0e1b8..b36f783 100644
--- a/rating_api/models/db.py
+++ b/rating_api/models/db.py
@@ -33,7 +33,7 @@ class Lecturer(BaseDbModel):
     last_name: Mapped[str] = mapped_column(String, nullable=False)
     middle_name: Mapped[str] = mapped_column(String, nullable=False)
     avatar_link: Mapped[str] = mapped_column(String, nullable=True)
-    timetable_id: Mapped[int] = mapped_column(Integer, unique=True, nullable=False)
+    timetable_id: Mapped[int]
     comments: Mapped[list[Comment]] = relationship("Comment", back_populates="lecturer")
     is_deleted: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
 
diff --git a/rating_api/schemas/models.py b/rating_api/schemas/models.py
index 2e2cc1e..6cd1ac5 100644
--- a/rating_api/schemas/models.py
+++ b/rating_api/schemas/models.py
@@ -78,7 +78,7 @@ class LecturerPost(Base):
     last_name: str
     middle_name: str
     avatar_link: str | None = None
-    timetable_id: int
+    timetable_id: int | None = None
 
 
 class LecturerPatch(Base):