diff --git a/src/common/meta/src/key.rs b/src/common/meta/src/key.rs
index f84e1e9b18ed..7e09b3dc33d7 100644
--- a/src/common/meta/src/key.rs
+++ b/src/common/meta/src/key.rs
@@ -83,7 +83,6 @@ pub mod datanode_table;
 #[allow(unused)]
 pub mod flow;
 pub mod schema_name;
-pub mod scope;
 pub mod table_info;
 pub mod table_name;
 // TODO(weny): removes it.
@@ -193,6 +192,32 @@ pub trait TableMetaKey {
     fn as_raw_key(&self) -> Vec<u8>;
 }
 
+/// The key of metadata.
+pub trait MetaKey<T> {
+    fn to_bytes(&self) -> Vec<u8>;
+
+    fn from_bytes(bytes: &[u8]) -> Result<T>;
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct BytesAdapter(Vec<u8>);
+
+impl From<Vec<u8>> for BytesAdapter {
+    fn from(value: Vec<u8>) -> Self {
+        Self(value)
+    }
+}
+
+impl MetaKey<BytesAdapter> for BytesAdapter {
+    fn to_bytes(&self) -> Vec<u8> {
+        self.0.clone()
+    }
+
+    fn from_bytes(bytes: &[u8]) -> Result<BytesAdapter> {
+        Ok(BytesAdapter(bytes.to_vec()))
+    }
+}
+
 pub(crate) trait TableMetaKeyGetTxnOp {
     fn build_get_op(
         &self,
diff --git a/src/common/meta/src/key/flow.rs b/src/common/meta/src/key/flow.rs
index 648ae09aeeed..8d3660a42e51 100644
--- a/src/common/meta/src/key/flow.rs
+++ b/src/common/meta/src/key/flow.rs
@@ -30,9 +30,8 @@ use crate::key::flow::flow_info::FlowInfoManager;
 use crate::key::flow::flow_name::FlowNameManager;
 use crate::key::flow::flownode_flow::FlownodeFlowManager;
 use crate::key::flow::table_flow::TableFlowManager;
-use crate::key::scope::MetaKey;
 use crate::key::txn_helper::TxnOpGetResponseSet;
-use crate::key::FlowId;
+use crate::key::{FlowId, MetaKey};
 use crate::kv_backend::txn::Txn;
 use crate::kv_backend::KvBackendRef;
 
diff --git a/src/common/meta/src/key/flow/flow_info.rs b/src/common/meta/src/key/flow/flow_info.rs
index b3ae9c78dca6..359b0595c13c 100644
--- a/src/common/meta/src/key/flow/flow_info.rs
+++ b/src/common/meta/src/key/flow/flow_info.rs
@@ -22,9 +22,10 @@ use table::metadata::TableId;
 
 use crate::error::{self, Result};
 use crate::key::flow::FlowScoped;
-use crate::key::scope::MetaKey;
 use crate::key::txn_helper::TxnOpGetResponseSet;
-use crate::key::{txn_helper, DeserializedValueWithBytes, FlowId, FlowPartitionId, TableMetaValue};
+use crate::key::{
+    txn_helper, DeserializedValueWithBytes, FlowId, FlowPartitionId, MetaKey, TableMetaValue,
+};
 use crate::kv_backend::txn::Txn;
 use crate::kv_backend::KvBackendRef;
 use crate::table_name::TableName;
diff --git a/src/common/meta/src/key/flow/flow_name.rs b/src/common/meta/src/key/flow/flow_name.rs
index 5dc0a7454041..63af877d406e 100644
--- a/src/common/meta/src/key/flow/flow_name.rs
+++ b/src/common/meta/src/key/flow/flow_name.rs
@@ -20,9 +20,10 @@ use snafu::OptionExt;
 
 use crate::error::{self, Result};
 use crate::key::flow::FlowScoped;
-use crate::key::scope::MetaKey;
 use crate::key::txn_helper::TxnOpGetResponseSet;
-use crate::key::{txn_helper, DeserializedValueWithBytes, FlowId, TableMetaValue, NAME_PATTERN};
+use crate::key::{
+    txn_helper, DeserializedValueWithBytes, FlowId, MetaKey, TableMetaValue, NAME_PATTERN,
+};
 use crate::kv_backend::txn::Txn;
 use crate::kv_backend::KvBackendRef;
 
diff --git a/src/common/meta/src/key/flow/flownode_flow.rs b/src/common/meta/src/key/flow/flownode_flow.rs
index 2e0471cce052..d9ae8a215fb5 100644
--- a/src/common/meta/src/key/flow/flownode_flow.rs
+++ b/src/common/meta/src/key/flow/flownode_flow.rs
@@ -22,8 +22,7 @@ use snafu::OptionExt;
 
 use crate::error::{self, Result};
 use crate::key::flow::FlowScoped;
-use crate::key::scope::{BytesAdapter, MetaKey};
-use crate::key::{FlowId, FlowPartitionId};
+use crate::key::{BytesAdapter, FlowId, FlowPartitionId, MetaKey};
 use crate::kv_backend::txn::{Txn, TxnOp};
 use crate::kv_backend::KvBackendRef;
 use crate::range_stream::{PaginationStream, DEFAULT_PAGE_SIZE};
@@ -214,7 +213,7 @@ impl FlownodeFlowManager {
 #[cfg(test)]
 mod tests {
     use crate::key::flow::flownode_flow::FlownodeFlowKey;
-    use crate::key::scope::MetaKey;
+    use crate::key::MetaKey;
 
     #[test]
     fn test_key_serialization() {
diff --git a/src/common/meta/src/key/flow/table_flow.rs b/src/common/meta/src/key/flow/table_flow.rs
index bd6b44493108..f05866447823 100644
--- a/src/common/meta/src/key/flow/table_flow.rs
+++ b/src/common/meta/src/key/flow/table_flow.rs
@@ -22,8 +22,7 @@ use table::metadata::TableId;
 
 use crate::error::{self, Result};
 use crate::key::flow::FlowScoped;
-use crate::key::scope::{BytesAdapter, MetaKey};
-use crate::key::{FlowId, FlowPartitionId};
+use crate::key::{BytesAdapter, FlowId, FlowPartitionId, MetaKey};
 use crate::kv_backend::txn::{Txn, TxnOp};
 use crate::kv_backend::KvBackendRef;
 use crate::range_stream::{PaginationStream, DEFAULT_PAGE_SIZE};
diff --git a/src/common/meta/src/key/scope.rs b/src/common/meta/src/key/scope.rs
deleted file mode 100644
index 7eed98fe1d50..000000000000
--- a/src/common/meta/src/key/scope.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright 2023 Greptime Team
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-use crate::error::Result;
-
-/// The key of metadata.
-pub trait MetaKey<T> {
-    fn to_bytes(&self) -> Vec<u8>;
-
-    fn from_bytes(bytes: &[u8]) -> Result<T>;
-}
-
-#[derive(Debug, Clone, PartialEq)]
-pub struct BytesAdapter(Vec<u8>);
-
-impl From<Vec<u8>> for BytesAdapter {
-    fn from(value: Vec<u8>) -> Self {
-        Self(value)
-    }
-}
-
-impl MetaKey<BytesAdapter> for BytesAdapter {
-    fn to_bytes(&self) -> Vec<u8> {
-        self.0.clone()
-    }
-
-    fn from_bytes(bytes: &[u8]) -> Result<BytesAdapter> {
-        Ok(BytesAdapter(bytes.to_vec()))
-    }
-}
-
-#[cfg(test)]
-mod tests {
-
-    use super::*;
-    use crate::error::Result;
-
-    #[derive(Debug)]
-    struct MockKey {
-        inner: Vec<u8>,
-    }
-
-    impl MetaKey<MockKey> for MockKey {
-        fn to_bytes(&self) -> Vec<u8> {
-            self.inner.clone()
-        }
-
-        fn from_bytes(bytes: &[u8]) -> Result<MockKey> {
-            Ok(MockKey {
-                inner: bytes.to_vec(),
-            })
-        }
-    }
-}