diff --git a/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py b/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
index f96a20bdee1..6bf33562dc6 100644
--- a/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
+++ b/caravel/migrations/versions/422116f431b7_add_d_timestamp_format_for_tables.py
@@ -15,8 +15,14 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.add_column('tables', sa.Column('timestamp_format', sa.String(length=256), nullable=True))
+	try:
+		op.add_column('tables', sa.Column('timestamp_format', sa.String(length=256), nullable=True))
+	except Exception:
+		pass
 
 
 def downgrade():
-    op.drop_column('tables', 'timestamp_format')
+	try:
+		op.drop_column('tables', 'timestamp_format')
+	except Exception:
+		pass