diff --git a/server/entity/Media.ts b/server/entity/Media.ts
index 68a5622c0..1932670e4 100644
--- a/server/entity/Media.ts
+++ b/server/entity/Media.ts
@@ -151,11 +151,11 @@ class Media {
   @Column({ nullable: true, type: 'varchar' })
   public ratingKey4k?: string | null;
 
-  @Column({ nullable: true })
-  public jellyfinMediaId?: string;
+  @Column({ nullable: true, type: 'varchar' })
+  public jellyfinMediaId?: string | null;
 
-  @Column({ nullable: true })
-  public jellyfinMediaId4k?: string;
+  @Column({ nullable: true, type: 'varchar' })
+  public jellyfinMediaId4k?: string | null;
 
   public serviceUrl?: string;
   public serviceUrl4k?: string;
diff --git a/server/lib/availabilitySync.ts b/server/lib/availabilitySync.ts
index 5bdbf593e..8b37bc85e 100644
--- a/server/lib/availabilitySync.ts
+++ b/server/lib/availabilitySync.ts
@@ -548,7 +548,7 @@ class AvailabilitySync {
         media[is4k ? 'ratingKey4k' : 'ratingKey'] =
           mediaStatus === MediaStatus.PROCESSING
             ? media[is4k ? 'ratingKey4k' : 'ratingKey']
-            : undefined;
+            : null;
       } else if (
         mediaServerType === MediaServerType.JELLYFIN ||
         mediaServerType === MediaServerType.EMBY
@@ -556,7 +556,7 @@ class AvailabilitySync {
         media[is4k ? 'jellyfinMediaId4k' : 'jellyfinMediaId'] =
           mediaStatus === MediaStatus.PROCESSING
             ? media[is4k ? 'jellyfinMediaId4k' : 'jellyfinMediaId']
-            : undefined;
+            : null;
       }
       logger.info(
         `The ${is4k ? '4K' : 'non-4K'} ${
diff --git a/server/lib/scanners/jellyfin/index.ts b/server/lib/scanners/jellyfin/index.ts
index ee546fe74..f5b0f66a2 100644
--- a/server/lib/scanners/jellyfin/index.ts
+++ b/server/lib/scanners/jellyfin/index.ts
@@ -168,9 +168,9 @@ class JellyfinScanner {
           newMedia.jellyfinMediaId =
             hasOtherResolution || (!this.enable4kMovie && has4k)
               ? metadata.Id
-              : undefined;
+              : null;
           newMedia.jellyfinMediaId4k =
-            has4k && this.enable4kMovie ? metadata.Id : undefined;
+            has4k && this.enable4kMovie ? metadata.Id : null;
           await mediaRepository.save(newMedia);
           this.log(`Saved ${metadata.Name}`);
         }
@@ -461,9 +461,9 @@ class JellyfinScanner {
               tmdbId: tvShow.id,
               tvdbId: tvShow.external_ids.tvdb_id,
               mediaAddedAt: new Date(metadata.DateCreated ?? ''),
-              jellyfinMediaId: isAllStandardSeasons ? Id : undefined,
+              jellyfinMediaId: isAllStandardSeasons ? Id : null,
               jellyfinMediaId4k:
-                isAll4kSeasons && this.enable4kShow ? Id : undefined,
+                isAll4kSeasons && this.enable4kShow ? Id : null,
               status: isAllStandardSeasons
                 ? MediaStatus.AVAILABLE
                 : newSeasons.some(