One-to-one relations

ERROR:  could not identify an equality operator for type json at character 716.

export const dungeon = pgTable('dungeon', {  
   id: serial('id').primaryKey(),  
   image: json('image'),  
   name: varchar('name', { length: 256 }),  
   gameId: integer('game_id').notNull().references(() => game.id, { onDelete: 'cascade' }),
   bossId: integer('boss_id').references(() => boss.id, { onDelete: 'cascade' }),  
});  

export const boss = pgTable('boss', {  
   id: serial('id').primaryKey(),  
   hp: integer('hp'),  
   name: varchar('name', { length: 256 }),  
   image: json('image'),  
});  

export const dungeonRelations = relations(dungeon, ({ many, one }) => ({  
   monsters: many(monster),  
   gameId: one(game, { fields: [dungeon.gameId], references: [game.id] }),  
   boss: one(boss, { fields: [dungeon.bossId], references: [boss.id] }),  
}));  

  const dungeons = await db.query.dungeon.findMany({  
     where: eq(dungeon.gameId, id),  
     with: {  
       monsters: true,  
       boss: true, <-- Without this, query working perfectly fine, so...
     },  
  });