diff --git a/src/frontend/src/catalog/system_catalog/rw_catalog/rw_fragments.rs b/src/frontend/src/catalog/system_catalog/rw_catalog/rw_fragments.rs
index ebe7369e46485..91f818e7919f7 100644
--- a/src/frontend/src/catalog/system_catalog/rw_catalog/rw_fragments.rs
+++ b/src/frontend/src/catalog/system_catalog/rw_catalog/rw_fragments.rs
@@ -14,7 +14,6 @@
 
 use risingwave_common::types::Fields;
 use risingwave_frontend_macro::system_catalog;
-use risingwave_pb::meta::table_fragments::fragment::FragmentDistributionType;
 use risingwave_pb::stream_plan::FragmentTypeFlag;
 
 use crate::catalog::system_catalog::SysCatalogReaderImpl;
@@ -53,36 +52,27 @@ async fn read_rw_fragment(reader: &SysCatalogReaderImpl) -> Result<Vec<RwFragmen
 
     Ok(distributions
         .into_iter()
-        .map(|distribution| {
-            let distribution_type = distribution.distribution_type();
-            let max_parallelism = match distribution_type {
-                FragmentDistributionType::Single => 1,
-                FragmentDistributionType::Hash => distribution.vnode_count as i32,
-                FragmentDistributionType::Unspecified => unreachable!(),
-            };
-
-            RwFragment {
-                fragment_id: distribution.fragment_id as i32,
-                table_id: distribution.table_id as i32,
-                distribution_type: distribution.distribution_type().as_str_name().into(),
-                state_table_ids: distribution
-                    .state_table_ids
-                    .into_iter()
-                    .map(|id| id as i32)
-                    .collect(),
-                upstream_fragment_ids: distribution
-                    .upstream_fragment_ids
-                    .into_iter()
-                    .map(|id| id as i32)
-                    .collect(),
-                flags: extract_fragment_type_flag(distribution.fragment_type_mask)
-                    .into_iter()
-                    .flat_map(|t| t.as_str_name().strip_prefix("FRAGMENT_TYPE_FLAG_"))
-                    .map(|s| s.into())
-                    .collect(),
-                parallelism: distribution.parallelism as i32,
-                max_parallelism,
-            }
+        .map(|distribution| RwFragment {
+            fragment_id: distribution.fragment_id as i32,
+            table_id: distribution.table_id as i32,
+            distribution_type: distribution.distribution_type().as_str_name().into(),
+            state_table_ids: distribution
+                .state_table_ids
+                .into_iter()
+                .map(|id| id as i32)
+                .collect(),
+            upstream_fragment_ids: distribution
+                .upstream_fragment_ids
+                .into_iter()
+                .map(|id| id as i32)
+                .collect(),
+            flags: extract_fragment_type_flag(distribution.fragment_type_mask)
+                .into_iter()
+                .flat_map(|t| t.as_str_name().strip_prefix("FRAGMENT_TYPE_FLAG_"))
+                .map(|s| s.into())
+                .collect(),
+            parallelism: distribution.parallelism as i32,
+            max_parallelism: distribution.vnode_count as i32,
         })
         .collect())
 }