diff --git a/integration_tests/snowflake-sink/upsert/create_sink.sql b/integration_tests/snowflake-sink/upsert/create_sink.sql
index 0986005d8c717..20f45968439db 100644
--- a/integration_tests/snowflake-sink/upsert/create_sink.sql
+++ b/integration_tests/snowflake-sink/upsert/create_sink.sql
@@ -13,7 +13,4 @@ CREATE SINK snowflake_sink FROM ss_mv WITH (
     snowflake.aws_secret_access_key = 'EXAMPLE_SECRET_KEY',
     snowflake.aws_region = 'EXAMPLE_REGION',
     snowflake.s3_path = 'EXAMPLE_S3_PATH',
-    -- depends on your mv setup, note that snowflake sink *only* supports
-    -- `append-only` mode at present.
-    force_append_only = 'true'
 );
\ No newline at end of file
diff --git a/src/frontend/src/optimizer/plan_node/stream_changelog.rs b/src/frontend/src/optimizer/plan_node/stream_changelog.rs
index d84aa8c7e0cdf..0ee696c58067a 100644
--- a/src/frontend/src/optimizer/plan_node/stream_changelog.rs
+++ b/src/frontend/src/optimizer/plan_node/stream_changelog.rs
@@ -43,7 +43,8 @@ impl StreamChangeLog {
         let base = PlanBase::new_stream_with_core(
             &core,
             dist,
-            input.append_only(),
+            // The changelog will convert all delete/update to insert, so it must be true here.
+            true,
             input.emit_on_window_close(),
             watermark_columns,
         );