# changeset_id :bigint(8) not null
# timestamp :datetime not null
# version :bigint(8) not null, primary key
# changeset_id :bigint(8) not null
# timestamp :datetime not null
# version :bigint(8) not null, primary key
# check whether this element is the latest version - that is,
# has the same version as its "current" counterpart.
# check whether this element is the latest version - that is,
# has the same version as its "current" counterpart.