diff --git a/.env.example b/.env.example
index aa5e51b..23105d9 100644
--- a/.env.example
+++ b/.env.example
@@ -30,6 +30,9 @@ GRAPHQL_PLAYGROUND=1
 # VITE_SITE_URL='https://www.develop.staging.example.com'
 # CYPRESS_API_BASE_URL='https://app.develop.staging.example.com/api'
 
+### debug
+# DEBUG_VAR=1
+
 ### debug:on,local
 # DEBUG=1
 ### debug:off,staging
diff --git a/README.md b/README.md
index 4e065f9..298e36b 100644
--- a/README.md
+++ b/README.md
@@ -25,10 +25,16 @@ vnetod local debug  # enable local and debug sections
 vnetod              # disable all sections
 ```
 
-Namespaces
+You can also use variables from namespaces
 
 ```sh
-vnetod db:local debug:on
+vnetod db:staging debug:off
+```
+
+You can switch between states and overwrite from namespaces at the same time.
+
+```sh
+vnetod local db:staging debug:off
 ```
 
 # License
diff --git a/src/cli/switch.rs b/src/cli/switch.rs
index e9829bd..a48ae7c 100644
--- a/src/cli/switch.rs
+++ b/src/cli/switch.rs
@@ -1,5 +1,5 @@
 use crate::{cli::Args, domain};
-use std::{cell::RefCell, fs::File};
+use std::fs::File;
 
 #[derive(Debug)]
 pub enum Error {
@@ -7,13 +7,24 @@ pub enum Error {
     Switch(domain::switch::Error),
 }
 
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Error::OpenFile => f.write_str("Cannot open file"),
+            Error::Switch(inner) => write!(f, "Cannot switch between states: {}", inner),
+        }
+    }
+}
+
+impl std::error::Error for Error {}
+
 pub fn execute(args: &Args) -> Result<(), Error> {
-    let reader = File::open(&args.file).map_err(|_| Error::OpenFile)?;
+    let content = std::fs::read_to_string(&args.file).map_err(|_| Error::OpenFile)?;
     let writer =
         File::create(args.output.as_ref().unwrap_or(&args.file)).map_err(|_| Error::OpenFile)?;
 
     domain::switch::execute(domain::switch::Request {
-        reader: RefCell::new(reader),
+        content: &content,
         writer,
         sections: &args.sections,
     })
diff --git a/src/domain/switch.rs b/src/domain/switch.rs
index 4c54b5d..25d4a98 100644
--- a/src/domain/switch.rs
+++ b/src/domain/switch.rs
@@ -1,35 +1,35 @@
-use std::cell::RefCell;
-use std::io::{BufWriter, Read, Write};
+use std::io::{BufWriter, Write};
 
 use super::Section;
 
 #[derive(Debug)]
 pub enum Error {
-    ReadData,
     WriteData,
 }
 
-pub struct Request<'args, R, W>
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Error::WriteData => f.write_str("Cannot write data"),
+        }
+    }
+}
+
+impl std::error::Error for Error {}
+
+pub struct Request<'args, W>
 where
-    R: Read,
     W: Write,
 {
-    pub reader: RefCell<R>,
+    pub content: &'args str,
     pub writer: W,
     pub sections: &'args [String],
 }
 
-pub fn execute<R, W>(req: Request<R, W>) -> Result<(), Error>
+pub fn execute<W>(req: Request<W>) -> Result<(), Error>
 where
-    R: Read,
     W: Write,
 {
-    let mut content = String::new();
-    req.reader
-        .borrow_mut()
-        .read_to_string(&mut content)
-        .map_err(|_| Error::ReadData)?;
-
     let mut writer = BufWriter::new(req.writer);
 
     let choose_sections = req
@@ -40,7 +40,7 @@ where
 
     let mut current_sections: Option<Vec<Section>> = None;
 
-    for line in content.split_inclusive('\n') {
+    for line in req.content.split_inclusive('\n') {
         let new_line = if is_section_end(line) {
             current_sections = None;
             line.to_string()
@@ -102,31 +102,29 @@ fn should_enable_variable(choose_sections: &[Section], current_sections: &[Secti
 fn should_disable_variable(choose_sections: &[Section], current_sections: &[Section]) -> bool {
     choose_sections.is_empty()
         || choose_sections.iter().any(|s| s.namespace.is_none())
-        || !choose_sections
+        || choose_sections
             .iter()
             .filter(|s| s.namespace.is_some())
             .any(|s| {
                 current_sections
                     .iter()
-                    .any(|s2| s.namespace == s2.namespace)
+                    .any(|s2| s.namespace == s2.namespace && s.name != s2.name)
             })
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::cell::RefCell;
     use std::io::Cursor;
 
     const BASE_ENV: &str = include_str!("../../test_data/base_env");
 
     fn make_test(input: &str, expected_output: &str, sections: Vec<&str>) {
-        let reader = RefCell::new(Cursor::new(input));
         let mut output_data = vec![];
         let writer = Cursor::new(&mut output_data);
 
         match execute(Request {
-            reader,
+            content: input,
             writer,
             sections: &sections.into_iter().map(String::from).collect::<Vec<_>>(),
         }) {
@@ -238,11 +236,27 @@ mod tests {
         }
 
         #[test]
-        fn should_disable_variables() {
-            assert!(should_disable_variable(
+        fn should_not_disable_variables() {
+            assert!(!should_disable_variable(
                 &[Section::with_namespace("debug", "on")],
                 &[Section::new("local")]
             ));
         }
+
+        #[test]
+        fn should_disable_variables() {
+            assert!(should_disable_variable(
+                &[Section::new("local")],
+                &[Section::with_namespace("debug", "off")]
+            ));
+            assert!(should_disable_variable(
+                &[],
+                &[Section::with_namespace("debug", "off")]
+            ));
+            assert!(should_disable_variable(
+                &[Section::with_namespace("debug", "on")],
+                &[Section::with_namespace("debug", "off")]
+            ));
+        }
     }
 }