diff --git a/src/lib.rs b/src/lib.rs
index 8f787ba..b5eda2c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,14 +14,14 @@ pub static MONGO_CLIENT: OnceCell<mongodb::Client> = OnceCell::const_new();
 #[macro_export]
 macro_rules! get_mongo {
     () => {
-        if let Some(client) = crate::MONGO_CLIENT.get() {
+        if let Some(client) = $crate::MONGO_CLIENT.get() {
             client
         } else {
             let client = mongodb::Client::with_uri_str(&std::env::var("DB_URI").unwrap())
                 .await
                 .unwrap();
-            crate::MONGO_CLIENT.set(client).unwrap();
-            crate::MONGO_CLIENT.get().unwrap()
+            $crate::MONGO_CLIENT.set(client).unwrap();
+            $crate::MONGO_CLIENT.get().unwrap()
         }
     };
 }
@@ -31,7 +31,7 @@ macro_rules! get_mongo {
 macro_rules! col {
     ($db:expr, $col:expr) => {
         $db.database(&std::env::var("DB").unwrap())
-            .collection::<mongodb::bson::Document>($col)
+            .collection::<$crate::mongodb::bson::Document>($col)
     };
 }
 
@@ -54,6 +54,6 @@ macro_rules! collect_results {
 #[macro_export]
 macro_rules! id_of {
     ($id:expr) => {
-        mongodb::bson::doc! { "_id": $id}
+        $crate::mongodb::bson::doc! { "_id": $id}
     };
 }
diff --git a/src/model/historic.rs b/src/model/historic.rs
index 9b8c2bf..85d8286 100644
--- a/src/model/historic.rs
+++ b/src/model/historic.rs
@@ -11,7 +11,7 @@ pub struct Historic<T> {
     pub changes: HashMap<String, T>,
 }
 
-impl<T: Clone + std::cmp::PartialEq> Historic<T> {
+impl<T: Clone> Historic<T> {
     /// Create a new value with tracked history
     pub fn new(value: T) -> Historic<T> {
         let mut changes = HashMap::new();
@@ -22,16 +22,27 @@ impl<T: Clone + std::cmp::PartialEq> Historic<T> {
             changes,
         }
     }
+}
 
+impl<T: Clone> Historic<T> {
     /// Update the value. The change will be recorded.
+    /// Will record a change even if the value is the same as the current one.
     pub fn update(&mut self, value: T) {
+        self.changes
+            .insert(chrono::Utc::now().to_rfc3339(), value.clone());
+        self.current = value;
+    }
+}
+
+impl<T: Clone + std::cmp::PartialEq> Historic<T> {
+    /// Update the value. The change will be recorded.
+    /// If the value is equal to the current one, no update will take place.
+    pub fn update_unique(&mut self, value: T) {
         if self.current == value {
             return;
         }
 
-        self.changes
-            .insert(chrono::Utc::now().to_rfc3339(), value.clone());
-        self.current = value;
+        self.update(value);
     }
 }