Use is_valid for Id

src/data_provider/card_stats.rs

@@ -1,4 +1,4 @@
-use crate::lang::{DeckSettings, CardStatistics, INVALID_ID};
+use crate::lang::{CardStatistics, DeckSettings, INVALID_ID};
 use rusqlite::Connection;
 use std::time::Instant;
 
@@ -64,7 +64,7 @@ pub fn add_stat_list(stat: &mut [CardStatistics], connection: &Connection) {
     for (index, id) in (start_index..=last_index).enumerate() {
         stat[index].id = id.into();
     }
-    
+
     println!("Added {} cards for {:?}", stat.len(), time.elapsed());
 }
 
@@ -103,7 +103,7 @@ pub fn update_stat_score(stat: &CardStatistics, connection: &Connection) {
 }
 
 pub fn delete_stat(stat: &CardStatistics, connection: &Connection) {
-    if stat.id == INVALID_ID {
+    if !stat.id.is_valid() {
         return;
     }
     connection