diff --git a/servicex_app/migrations/versions/v1_5_5.py b/servicex_app/migrations/versions/v1_5_5.py
new file mode 100644
index 00000000..69bf810d
--- /dev/null
+++ b/servicex_app/migrations/versions/v1_5_5.py
@@ -0,0 +1,30 @@
+"""
+Mark dataset rows as stale
+
+Revision ID: v1_5_5
+Revises: v1_3_0
+Create Date: 2024-11-11 16:06:00.000000
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = 'v1_5_5'
+down_revision = 'v1_3_0'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column('datasets', sa.Column('stale',
+                                        sa.Boolean(),
+                                        nullable=False,
+                                        server_default='false'))
+    # This was never used, so a fine time to delete it
+    op.drop_column('transform_result', 'did')
+
+
+def downgrade():
+    op.drop_column('datasets', 'stale')
+    # No need to add the transform_result.did column back in
diff --git a/servicex_app/servicex_app/models.py b/servicex_app/servicex_app/models.py
index 870bc613..00be81fd 100644
--- a/servicex_app/servicex_app/models.py
+++ b/servicex_app/servicex_app/models.py
@@ -359,7 +359,6 @@ class TransformationResult(db.Model):
     __tablename__ = 'transform_result'
 
     id = db.Column(db.Integer, primary_key=True)
-    did = db.Column(db.String(512), unique=False, nullable=False)
     file_id = db.Column(db.Integer, ForeignKey('files.id'))
     file_path = db.Column(db.String(512), unique=False, nullable=False)
     request_id = db.Column(db.String(48), unique=False, nullable=False)
@@ -378,7 +377,6 @@ def to_json(cls, x):
         return {
             'id': x.id,
             'request-id': x.request_id,
-            'did': x.did,
             'file-id': x.id,
             'file-path': x.file_path,
             'transform_status': x.transform_status,
diff --git a/servicex_app/servicex_app/resources/internal/transformer_file_complete.py b/servicex_app/servicex_app/resources/internal/transformer_file_complete.py
index 5835d715..64cb2896 100644
--- a/servicex_app/servicex_app/resources/internal/transformer_file_complete.py
+++ b/servicex_app/servicex_app/resources/internal/transformer_file_complete.py
@@ -98,7 +98,6 @@ def record_file_complete(logger: Logger, request_id: str, info: dict[str, str])
            )
     def save_transform_result(transform_req: TransformRequest, info: dict[str, str]):
         rec = TransformationResult(
-            did=transform_req.did,
             file_id=info['file-id'],
             request_id=transform_req.request_id,
             file_path=info['file-path'],