diff --git a/backend/alembic/versions/023_modify_chat_record.py b/backend/alembic/versions/023_modify_chat_record.py
new file mode 100644
index 0000000..cbe236c
--- /dev/null
+++ b/backend/alembic/versions/023_modify_chat_record.py
@@ -0,0 +1,75 @@
+"""023_modify_chat_record
+
+Revision ID: f535d09946f6
+Revises: e6b20ae73606
+Create Date: 2025-07-11 15:36:18.473133
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = 'f535d09946f6'
+down_revision = 'e6b20ae73606'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('chat_record', 'token_sql',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_chart',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_analysis',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_predict',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_recommended_question',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_select_datasource_question',
+               existing_type=sa.INTEGER(),
+               type_=sqlmodel.sql.sqltypes.AutoString(length=256),
+               existing_nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('chat_record', 'token_select_datasource_question',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_recommended_question',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_predict',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_analysis',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_chart',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('chat_record', 'token_sql',
+               existing_type=sqlmodel.sql.sqltypes.AutoString(length=256),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    # ### end Alembic commands ###