diff --git a/server/entity/Media.ts b/server/entity/Media.ts
index 47a3ed9c..1941162a 100644
--- a/server/entity/Media.ts
+++ b/server/entity/Media.ts
@@ -132,10 +132,23 @@ class Media {
   @UpdateDateColumn()
   public updatedAt: Date;
 
+  /**
+   * The `lastSeasonChange` column stores the date and time when the media was added to the library.
+   * It needs to be database-aware because SQLite supports `datetime` while PostgreSQL supports `timestamp with timezone (timestampz)`.
+   */
   @DbAwareColumn({ type: 'datetime', default: () => 'CURRENT_TIMESTAMP' })
   public lastSeasonChange: Date;
 
-  @DbAwareColumn({ type: 'datetime', default: () => 'CURRENT_TIMESTAMP' })
+  /**
+   * The `mediaAddedAt` column stores the date and time when the media was added to the library.
+   * It needs to be database-aware because SQLite supports `datetime` while PostgreSQL supports `timestamp with timezone (timestampz)`.
+   * This column is nullable because it can be null when the media is not yet synced to the library.
+   */
+  @DbAwareColumn({
+    type: 'datetime',
+    default: () => 'CURRENT_TIMESTAMP',
+    nullable: true,
+  })
   public mediaAddedAt: Date;
 
   @Column({ nullable: true, type: 'int' })
diff --git a/server/utils/DbColumnHelper.ts b/server/utils/DbColumnHelper.ts
index 4bdb00c9..1c030b92 100644
--- a/server/utils/DbColumnHelper.ts
+++ b/server/utils/DbColumnHelper.ts
@@ -2,7 +2,7 @@ import { isPgsql } from '@server/datasource';
 import type { ColumnOptions, ColumnType } from 'typeorm';
 import { Column } from 'typeorm';
 const pgTypeMapping: { [key: string]: ColumnType } = {
-  datetime: 'timestamp without time zone',
+  datetime: 'timestamp with time zone',
 };
 
 export function resolveDbType(pgType: ColumnType): ColumnType {