diff --git a/entry/src/github.rs b/entry/src/github.rs
index 47fab5d..607d27b 100644
--- a/entry/src/github.rs
+++ b/entry/src/github.rs
@@ -1,8 +1,9 @@
-use crate::data::CurrentVersion;
-use crate::{ending_point, OPT_CONFIG, STORE, UA};
+use crate::data::{CurrentVersion, EventCard};
+use crate::{OPT_CONFIG, STORE, UA, ending_point};
 use anyhow::anyhow;
 use reqwest::Client;
 use serde::Deserialize;
+use std::collections::HashMap;
 use std::sync::OnceLock;
 
 const COMMIT_URL: &str =
@@ -59,6 +60,24 @@ pub fn raw_url(path: &str) -> String {
         + path
 }
 
+pub fn deduplicate_event_cards(cards: Vec<EventCard>) -> Vec<EventCard> {
+    let mut map: HashMap<u64, EventCard> = HashMap::new();
+
+    for card in cards {
+        map.entry(card.card_id)
+            .and_modify(|existing| {
+                if card.id < existing.id {
+                    *existing = card.clone();
+                }
+            })
+            .or_insert(card);
+    }
+
+    let mut res: Vec<EventCard> = map.into_values().collect();
+    res.sort_by_key(|c| c.id);
+    res
+}
+
 pub async fn sync_data() -> anyhow::Result<()> {
     let client = http_client()?;
     let (events_cards, event_stories, cards) = tokio::try_join!(
@@ -68,15 +87,13 @@ pub async fn sync_data() -> anyhow::Result<()> {
             .send()
             .await?
             .text(),
-        client
-            .get(raw_url("cards.json"))
-            .send()
-            .await?
-            .text()
+        client.get(raw_url("cards.json")).send().await?.text()
     )?;
     ending_point!(ok);
     let mut store = STORE.write().map_err(|e| anyhow!("{}", e))?;
-    store.set_event_cards(serde_json::from_str(&events_cards)?);
+    store.set_event_cards(deduplicate_event_cards(serde_json::from_str(
+        &events_cards,
+    )?));
     store.set_event_stories(serde_json::from_str(&event_stories)?);
     store.set_cards(serde_json::from_str(&cards)?);