diff --git a/source/src/main/java/one/nem/lacerta/source/database/entity/LibraryEntity.java b/source/src/main/java/one/nem/lacerta/source/database/entity/LibraryEntity.java
index 54e82bf9..e8c45b09 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/entity/LibraryEntity.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/entity/LibraryEntity.java
@@ -22,7 +22,4 @@ public class LibraryEntity {
     @ColumnInfo(name = "path")
     public String path; // パス
 
-    // タグ
-    @ColumnInfo(name = "tags")
-    public ArrayList<TagEntity> tags;
 }