Missed a migration.

migrations/versions/3983bf3ef8d1_.py

@@ -0,0 +1,31 @@
+"""empty message
+
+Revision ID: 3983bf3ef8d1
+Revises: 86032c036115
+Create Date: 2021-01-19 13:38:59.197092
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '3983bf3ef8d1'
+down_revision = '86032c036115'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('sample', sa.Column('created_on', sa.DateTime(), nullable=True))
+    op.execute("UPDATE sample SET created_on = date")
+    op.alter_column('sample', 'created_on', nullable=False)
+    # ### end Alembic commands ###
+
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('sample', 'created_on')
+    # ### end Alembic commands ###