diff --git a/server/lib/availabilitySync.ts b/server/lib/availabilitySync.ts
index 9bdf51c4..bd01b457 100644
--- a/server/lib/availabilitySync.ts
+++ b/server/lib/availabilitySync.ts
@@ -300,7 +300,6 @@ class AvailabilitySync {
           // Sonarr finds that season, we will change the final seasons value
           // to true.
           const filteredSeasonsMap: Map<number, boolean> = new Map();
-
           media.seasons
             .filter(
               (season) =>
@@ -311,48 +310,7 @@ class AvailabilitySync {
               filteredSeasonsMap.set(season.seasonNumber, false)
             );
 
-          // non-4k
-          const finalSeasons: Map<number, boolean> = new Map();
-
-          if (mediaServerType === MediaServerType.PLEX) {
-            plexSeasonsMap.forEach((value, key) => {
-              finalSeasons.set(key, value);
-            });
-
-            filteredSeasonsMap.forEach((value, key) => {
-              if (!finalSeasons.has(key)) {
-                finalSeasons.set(key, value);
-              }
-            });
-
-            sonarrSeasonsMap.forEach((value, key) => {
-              if (!finalSeasons.has(key)) {
-                finalSeasons.set(key, value);
-              }
-            });
-          } else if (
-            mediaServerType === MediaServerType.JELLYFIN ||
-            mediaServerType === MediaServerType.EMBY
-          ) {
-            jellyfinSeasonsMap.forEach((value, key) => {
-              finalSeasons.set(key, value);
-            });
-
-            filteredSeasonsMap.forEach((value, key) => {
-              if (!finalSeasons.has(key)) {
-                finalSeasons.set(key, value);
-              }
-            });
-
-            sonarrSeasonsMap.forEach((value, key) => {
-              if (!finalSeasons.has(key)) {
-                finalSeasons.set(key, value);
-              }
-            });
-          }
-
           const filteredSeasonsMap4k: Map<number, boolean> = new Map();
-
           media.seasons
             .filter(
               (season) =>
@@ -363,44 +321,32 @@ class AvailabilitySync {
               filteredSeasonsMap4k.set(season.seasonNumber, false)
             );
 
-          // 4k
-          const finalSeasons4k: Map<number, boolean> = new Map();
+          let finalSeasons: Map<number, boolean>;
+          let finalSeasons4k: Map<number, boolean>;
 
           if (mediaServerType === MediaServerType.PLEX) {
-            plexSeasonsMap4k.forEach((value, key) => {
-              finalSeasons4k.set(key, value);
-            });
-
-            filteredSeasonsMap4k.forEach((value, key) => {
-              if (!finalSeasons4k.has(key)) {
-                finalSeasons4k.set(key, value);
-              }
-            });
-
-            sonarrSeasonsMap4k.forEach((value, key) => {
-              if (!finalSeasons4k.has(key)) {
-                finalSeasons4k.set(key, value);
-              }
-            });
-          } else if (
-            mediaServerType === MediaServerType.JELLYFIN ||
-            mediaServerType === MediaServerType.EMBY
-          ) {
-            jellyfinSeasonsMap4k.forEach((value, key) => {
-              finalSeasons4k.set(key, value);
-            });
-
-            filteredSeasonsMap4k.forEach((value, key) => {
-              if (!finalSeasons4k.has(key)) {
-                finalSeasons4k.set(key, value);
-              }
-            });
-
-            sonarrSeasonsMap4k.forEach((value, key) => {
-              if (!finalSeasons4k.has(key)) {
-                finalSeasons4k.set(key, value);
-              }
-            });
+            finalSeasons = new Map([
+              ...filteredSeasonsMap,
+              ...plexSeasonsMap,
+              ...sonarrSeasonsMap,
+            ]);
+            finalSeasons4k = new Map([
+              ...filteredSeasonsMap4k,
+              ...plexSeasonsMap4k,
+              ...sonarrSeasonsMap4k,
+            ]);
+          } else {
+            // Jellyfin/Emby
+            finalSeasons = new Map([
+              ...filteredSeasonsMap,
+              ...jellyfinSeasonsMap,
+              ...sonarrSeasonsMap,
+            ]);
+            finalSeasons4k = new Map([
+              ...filteredSeasonsMap4k,
+              ...jellyfinSeasonsMap4k,
+              ...sonarrSeasonsMap4k,
+            ]);
           }
 
           if (
@@ -993,8 +939,8 @@ class AvailabilitySync {
         existsInJellyfin = true;
       }
     } catch (ex) {
-      if (!ex.message.includes('404' || '500')) {
-        existsInJellyfin = false;
+      if (!ex.message.includes('404') && !ex.message.includes('500')) {
+        existsInJellyfin = true;
         preventSeasonSearch = true;
         logger.debug(
           `Failure retrieving the ${is4k ? '4K' : 'non-4K'} ${