Creating a simple entity which contains:

@Id
@GeneratedValue
public long id;

@Version
public int version;

@Column(length = 40)
public String key;

fails because member 'key' is also a MySQL keyword and is not escaped. The SQL generated is:
create table TestEntity (id bigint not null auto_increment, version integer not null, `key` varchar(40), primary key (id)) engine=InnoDB