Complex sentence: The concession by PT Bakrie Toll Road is in dispute because they have paid only the first of six installments to the previous concession owner, and the project is halted until the dispute is resolved.
Split into simpler sentences: The concession by PT Bakrie Toll Road is on dispute due to PT Bakrie Toll Road only yet pay the first installment from six installment to the previous owner concession. For temporary the project is halted until the dispute is resolved.