수정

backend/alembic/versions/0007_add_portfolio_market_column.py

@@ -16,10 +16,16 @@ depends_on = None
 
 
 def upgrade() -> None:
-    op.add_column(
-        "portfolio",
-        sa.Column("market", sa.String(10), nullable=True, server_default="KRX"),
-    )
+    conn = op.get_bind()
+    result = conn.execute(sa.text(
+        "SELECT 1 FROM information_schema.columns "
+        "WHERE table_name='portfolio' AND column_name='market'"
+    ))
+    if not result.fetchone():
+        op.add_column(
+            "portfolio",
+            sa.Column("market", sa.String(10), nullable=True, server_default="KRX"),
+        )
 
 
 def downgrade() -> None: