Single jpa @Query to return true/false when count in one table is equal to column value in other table

Question

I have 2 entities: Leaflet and Page with One to Many relation (many Pages per Leaflet)

@Entity
Leaflet {
 @Id
 @GeneratedValue
 private UUID leafletId;
 private Integer noPages;
 @OneToMany(mappedBy = "leaflet", cascade = CascadeType.ALL, orphanRemoval = true)
 Set<Page> pages = new HashSet<>();
}

@Entity 
Page {
 @Id
 @GeneratedValue
 private UUID pageId;
 @ManyToOne(fetch = FetchType.LAZY)
 @JoinColumn(name = "leaflet_id")
 private Leaflet leaflet;
 @Enumerated
 private PageStatus status = PageStatus.CREATED;
}

and status enum

public enum PageStatus {
CREATED,
FRAMED

}

I would like to write single query to return whether all Pages for given Leaflet are already FRAMED. So I wrote this

@Repository
public interface PageRepository extends JpaRepository<Page, UUID> {

@Query("SELECT case when (COUNT(p) = l.noPages) then true else false end from Page p inner join Leaflet l on p.leaflet.leafletId = l.leafletId  where p.status = 1 and l.leafletId = ?1")
    boolean allPagesFramed(UUID leafletId);
}

but error comes which means I cannot use l.noPages directly

ERROR: column "leaflet1_.no_pages" must appear in the GROUP BY clause or be used in an aggregate function org.hibernate.exception.SQLGrammarException: could not extract ResultSet

Is there a way to make it 1 query ? Of course, I can first select l.noPages with first hit to DB, then inject this value to above query (instead of join) which I'm doing right now as workaround.