diff --git a/api/migrations/versions/2026_01_27_1815-788d3099ae3a_add_summary_index_feature.py b/api/migrations/versions/2026_01_27_1815-788d3099ae3a_add_summary_index_feature.py
index 3c2e0822e1..c6c72859dc 100644
--- a/api/migrations/versions/2026_01_27_1815-788d3099ae3a_add_summary_index_feature.py
+++ b/api/migrations/versions/2026_01_27_1815-788d3099ae3a_add_summary_index_feature.py
@@ -51,7 +51,7 @@ def upgrade():
             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))
+            batch_op.add_column(sa.Column('need_summary', sa.Boolean(), server_default=sa.text('false'), nullable=False))
     else:
         # MySQL: Use compatible syntax
         op.create_table(
@@ -83,7 +83,7 @@ def upgrade():
             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))
+            batch_op.add_column(sa.Column('need_summary', sa.Boolean(), server_default=sa.text('false'), nullable=False))
 
     # ### end Alembic commands ###
 
diff --git a/api/models/dataset.py b/api/models/dataset.py
index 6ab8f372bf..e7da2961bc 100644
--- a/api/models/dataset.py
+++ b/api/models/dataset.py
@@ -420,7 +420,7 @@ class Document(Base):
     doc_metadata = mapped_column(AdjustedJSON, nullable=True)
     doc_form = mapped_column(String(255), nullable=False, server_default=sa.text("'text_model'"))
     doc_language = mapped_column(String(255), nullable=True)
-    need_summary: Mapped[bool | None] = mapped_column(sa.Boolean, nullable=True, server_default=sa.text("false"))
+    need_summary: Mapped[bool] = mapped_column(sa.Boolean, nullable=False, server_default=sa.text("false"))
 
     DATA_SOURCES = ["upload_file", "notion_import", "website_crawl"]