Fix duplicates issue with local version cache

src/repository/local_versions.rs

@@ -17,6 +17,7 @@ pub struct InstalledVersions {
 impl InstalledVersions {
     pub fn new(mut versions: Vec<(SimpleVersion, VersionMetadata)>) -> Self {
         versions.sort_by_key(|e| e.0);
+        versions.dedup_by_key(|e| e.0);
         Self {
             ordered_versions: versions,
         }
@@ -53,6 +54,7 @@ impl InstalledVersions {
     pub fn insert(&mut self, version: (SimpleVersion, VersionMetadata)) {
         self.ordered_versions.push(version);
         self.ordered_versions.sort_by_key(|e| e.0);
+        self.ordered_versions.dedup_by_key(|e| e.0);
     }
 
     /// Removes a version. This keeps the order intact

src/repository/mod.rs

@@ -104,9 +104,14 @@ impl Repository {
 
         let installed_versions = match InstalledVersions::load() {
             Ok(v) => v,
-            Err(_) => load_installed_versions_info(downloader.versions().await?)
-                .await?
-                .into(),
+            Err(_) => {
+                let installed: InstalledVersions =
+                    load_installed_versions_info(downloader.versions().await?)
+                        .await?
+                        .into();
+                installed.save()?;
+                installed
+            }
         };
 
         Ok(Self {