diff --git a/src/cache/mod.rs b/src/cache/mod.rs
index 33c28e2..7b3bc57 100644
--- a/src/cache/mod.rs
+++ b/src/cache/mod.rs
@@ -41,13 +41,7 @@ impl Cache {
 
     /// ref to download probems
     pub fn update(self) -> Result<(), Error> {
-        let c = conn((&self.0.conf.storage.cache()?).to_owned());
-        let ps = self.download_problems()?;
-        for i in ps.into_iter() {
-            let target = problems.filter(id.eq(i.id));
-            diesel::update(target).set(i.to_owned()).execute(&c)?;
-        }
-
+        self.download_problems()?;
         Ok(())
     }
 
@@ -68,13 +62,9 @@ impl Cache {
             parser::problem(&mut ps, json)?;
         }
 
-        let count = self.get_problems()?.len();
-        if count == 0 {
-            ps.sort_by(|a, b| b.id.partial_cmp(&a.id).unwrap_or(std::cmp::Ordering::Equal));
-            diesel::insert_into(problems)
-                .values(&ps)
-                .execute(&self.conn()?)?;
-        }
+        diesel::replace_into(problems)
+            .values(&ps)
+            .execute(&self.conn()?)?;
 
         Ok(ps)
     }
diff --git a/src/cmds/pick.rs b/src/cmds/pick.rs
index 02dcc52..fa35d3b 100644
--- a/src/cmds/pick.rs
+++ b/src/cmds/pick.rs
@@ -100,13 +100,16 @@ impl Command for PickCommand {
             crate::helper::filter(&mut problems, query.to_string());
         }
 
-        if let Some(id) = m.value_of("id") {
-            problems.retain(|x| x.fid.to_string() == id);
-        }
-
-        let problem = &problems[rand::thread_rng().gen_range(0, problems.len())];
+        let fid = m
+            .value_of("id")
+            .and_then(|id| id.parse::<i32>().ok())
+            .unwrap_or_else(|| {
+                // Pick random without specify id
+                let problem = &problems[rand::thread_rng().gen_range(0, problems.len())];
+                problem.fid
+            });
 
-        let r = cache.get_question(problem.fid);
+        let r = cache.get_question(fid);
         if r.is_err() {
             let e = r.err()?;
             eprintln!("{:?}", &e);
diff --git a/src/err.rs b/src/err.rs
index a01fe77..cc3360e 100644
--- a/src/err.rs
+++ b/src/err.rs
@@ -1,4 +1,5 @@
 //! Errors in leetcode-cli
+use crate::cmds::{Command, DataCommand};
 use colored::Colorize;
 use std::fmt;
 
@@ -14,6 +15,7 @@ pub enum Error {
     ScriptError(String),
     CookieError,
     DecryptError,
+    SilentError,
 }
 
 impl std::fmt::Debug for Error {
@@ -40,6 +42,7 @@ impl std::fmt::Debug for Error {
             Error::MatchError => write!(f, "{} Nothing matches", e),
             Error::DecryptError => write!(f, "{} openssl decrypt failed", e),
             Error::ScriptError(s) => write!(f, "{} {}", e, s),
+            Error::SilentError => write!(f, ""),
         }
     }
 }
@@ -61,7 +64,14 @@ impl std::convert::From<std::num::ParseIntError> for Error {
 // sql
 impl std::convert::From<diesel::result::Error> for Error {
     fn from(err: diesel::result::Error) -> Self {
-        Error::CacheError(err.to_string())
+        match err {
+            diesel::result::Error::NotFound => {
+                println!("NotFound, you may update cache, and try it again\r\n");
+                DataCommand::usage().print_help().unwrap_or(());
+                Error::SilentError
+            }
+            _ => Error::CacheError(err.to_string()),
+        }
     }
 }