Composite key class relationship → ERROR: not mapped to a single property

[Cleber Farinazzo Junior]

CVariacaoTO class has a composite key (FK_T, FK_F, FK_F_VARIACAO). (FK_F, FK_F_VARIACAO) are also foreign key to FVariacaoTO table, in a ManyToOne relationship.

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns({
@JoinColumn(name = "FK_F", referencedColumnName = "FK_F", nullable = false, insertable = false, updatable = false),
@JoinColumn(name = "FK_F_V", referencedColumnName = "ID", nullable = false, insertable = false, updatable = false) })
@NotNull
private FVariacaoTO fVariacaoTO;

FVariacaoTO class has two primary keys, into a @Embeddable class FVariacaoPK.

This ERROR has ocurred: referencedColumnNames(FK_F, ID) of CVariacaoTO.fVariacaoTO not mapped to a single property

Relationship is just described in CVariacaoTO class. I don't know if a need write something about relationship in FVariacaoTO class, making @OneToMany or something like that.

What usually done this error?
How usually is done this kind of relationship?