I am new ? help

export 
const
 postCommentsTable = pgTable("post_comments", {
  id: uuid("id").defaultRandom().primaryKey(),
  postId: uuid("post_id").notNull().references(() 
=>
 postsTable.id, { onDelete: "cascade" }),
  userId: uuid("user_id").notNull().references(() 
=>
 userTable.id),
  parentId: uuid("parent_id").references(() 
=>
 postCommentsTable.id),
  content: text("content").notNull(),
  createdAt: timestamp("created_at").defaultNow(),
});


This gives error how do I refrence a comment in a post comment ?