@Entity
@Table(name = "MYT_Team")
public class Team extends Named implements Serializable {

 ...
 @OneToMany(mappedBy = "team", cascade = CascadeType.ALL, fetch = FetchType.EAGER,  targetEntity = Player.class)
 private Set<Player> players = new HashSet<Player>();
 ...
}

@Entity
@Table(name = "MYT_Player")
public class Player extends Human {
 ...
 @ManyToOne(fetch = FetchType.EAGER)
 private Team team;
 ...
}

[EL Finer]: client released
[EL Finer]: client acquired: 1688731466
[EL Finer]: acquire unit of work: 1365870310
[EL Finest]: Execute query ReadObjectQuery(name="readObject" referenceClass=Team sql="SELECT ID, COUNTRY, INSERTEDAT, INSERTEDBY, NAME, TOURNAMENT_ID FROM MYT_Team WHERE (ID = ?)")
[EL Finest]: Register the existing object de.ld.mytournament.domain.entity.team.Team@4f77d12e
[EL Finest]: Register the existing object de.ld.mytournament.domain.entity.tournament.Tournament@55c2a210
[EL Finest]: Register the existing object de.ld.mytournament.domain.entity.tournament.TournamentProperties@cd76ae54

[EL Finest]: Connection(30136561)--Connection acquired from connection pool [default].
[EL Fine]: Connection(30136561)--ALTER TABLE MYT_Player DROP CONSTRAINT FK_MYT_Player_TEAM_ID
[EL Fine]: SELECT 1 FROM DUAL
[EL Finest]: Connection(30136561)--Connection released to connection pool [default].
[EL Warning]: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: ORA-00942: Tabelle oder View nicht vorhanden

Error Code: 942
Call: ALTER TABLE MYT_Player DROP CONSTRAINT FK_MYT_Player_TEAM_ID
Query: DataModifyQuery(sql="ALTER TABLE MYT_Player DROP CONSTRAINT FK_MYT_Player_TEAM_ID")