diff --git a/api/migrations/versions/2026_01_12_1358-562dcce7d77c_add_summaryindex_feature.py b/api/migrations/versions/2026_01_12_1358-562dcce7d77c_add_summaryindex_feature.py
deleted file mode 100644
index 40fe419ef6..0000000000
--- a/api/migrations/versions/2026_01_12_1358-562dcce7d77c_add_summaryindex_feature.py
+++ /dev/null
@@ -1,69 +0,0 @@
-"""add SummaryIndex feature
-
-Revision ID: 562dcce7d77c
-Revises: 03ea244985ce
-Create Date: 2026-01-12 13:58:40.584802
-
-"""
-from alembic import op
-import models as models
-import sqlalchemy as sa
-
-
-# revision identifiers, used by Alembic.
-revision = '562dcce7d77c'
-down_revision = '03ea244985ce'
-branch_labels = None
-depends_on = None
-
-
-def upgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    op.create_table('document_segment_summary',
-    sa.Column('id', models.types.StringUUID(), nullable=False),
-    sa.Column('dataset_id', models.types.StringUUID(), nullable=False),
-    sa.Column('document_id', models.types.StringUUID(), nullable=False),
-    sa.Column('chunk_id', models.types.StringUUID(), nullable=False),
-    sa.Column('summary_content', models.types.LongText(), nullable=True),
-    sa.Column('summary_index_node_id', sa.String(length=255), nullable=True),
-    sa.Column('summary_index_node_hash', sa.String(length=255), nullable=True),
-    sa.Column('status', sa.String(length=32), server_default=sa.text("'generating'"), nullable=False),
-    sa.Column('error', models.types.LongText(), nullable=True),
-    sa.Column('enabled', sa.Boolean(), server_default=sa.text('true'), nullable=False),
-    sa.Column('disabled_at', sa.DateTime(), nullable=True),
-    sa.Column('disabled_by', models.types.StringUUID(), nullable=True),
-    sa.Column('created_at', sa.DateTime(), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=False),
-    sa.Column('updated_at', sa.DateTime(), server_default=sa.text('CURRENT_TIMESTAMP'), nullable=False),
-    sa.PrimaryKeyConstraint('id', name='document_segment_summary_pkey')
-    )
-    with op.batch_alter_table('document_segment_summary', schema=None) as batch_op:
-        batch_op.create_index('document_segment_summary_chunk_id_idx', ['chunk_id'], unique=False)
-        batch_op.create_index('document_segment_summary_dataset_id_idx', ['dataset_id'], unique=False)
-        batch_op.create_index('document_segment_summary_document_id_idx', ['document_id'], unique=False)
-        batch_op.create_index('document_segment_summary_status_idx', ['status'], unique=False)
-
-    with op.batch_alter_table('datasets', schema=None) as batch_op:
-        batch_op.add_column(sa.Column('summary_index_setting', models.types.AdjustedJSON(), nullable=True))
-
-    with op.batch_alter_table('documents', schema=None) as batch_op:
-        batch_op.add_column(sa.Column('need_summary', sa.Boolean(), server_default=sa.text('false'), nullable=True))
-
-    # ### end Alembic commands ###
-
-
-def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table('documents', schema=None) as batch_op:
-        batch_op.drop_column('need_summary')
-
-    with op.batch_alter_table('datasets', schema=None) as batch_op:
-        batch_op.drop_column('summary_index_setting')
-
-    with op.batch_alter_table('document_segment_summary', schema=None) as batch_op:
-        batch_op.drop_index('document_segment_summary_status_idx')
-        batch_op.drop_index('document_segment_summary_document_id_idx')
-        batch_op.drop_index('document_segment_summary_dataset_id_idx')
-        batch_op.drop_index('document_segment_summary_chunk_id_idx')
-
-    op.drop_table('document_segment_summary')
-    # ### end Alembic commands ###