diff --git a/packages/backend/migration/1704206095136-avatardecoration.js b/packages/backend/migration/1704206095136-avatardecoration.js
index ca1989d225..15e8f5a7c3 100644
--- a/packages/backend/migration/1704206095136-avatardecoration.js
+++ b/packages/backend/migration/1704206095136-avatardecoration.js
@@ -2,7 +2,7 @@ export class Avatardecoration1704206095136 {
     name = 'Avatardecoration1704206095136'
 
     async up(queryRunner) {
-        await queryRunner.query(`ALTER TABLE "avatar_decoration" ADD "category" character varying(256) NOT NULL`);
+        await queryRunner.query(`ALTER TABLE "avatar_decoration" ADD "category" character varying(256) NOT NULL DEFAULT '{}'`);
     }
 
     async down(queryRunner) {
diff --git a/packages/backend/src/models/AvatarDecoration.ts b/packages/backend/src/models/AvatarDecoration.ts
index f658663e68..010cbfe82d 100644
--- a/packages/backend/src/models/AvatarDecoration.ts
+++ b/packages/backend/src/models/AvatarDecoration.ts
@@ -33,6 +33,7 @@ export class MiAvatarDecoration {
 
 	@Column('varchar', {
 		length: 256,
+		default: '',
 	})
 	public category: string;