dt appears to be broken

qiskit.transpiler.exceptions.TranspilerError: 'The provided Delay duration is not in terms of dt.'

from qiskit import transpile, QuantumCircuit
from qiskit_ibm_runtime.fake_provider import FakeManilaV2


backend = FakeManilaV2()

circ = QuantumCircuit(1, 1)
circ.x(0)
circ.barrier(0)
circ.delay(160, 0, "dt")
circ.barrier(0)
circ.measure(0, 0)

transpile([circ], backend)

Traceback (most recent call last):
  File "/Code/qiskit-experiments/test.py", line 37, in <module>
    transpile([circ], backend)
    ~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/compiler/transpiler.py", line 327, in transpile
    out_circuits = pm.run(circuits, callback=callback, num_processes=num_processes)
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/transpiler/passmanager.py", line 419, in run
    return super().run(circuits, output_name, callback, num_processes=num_processes)
           ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/transpiler/passmanager.py", line 456, in wrapper
    return meth(*meth_args, **meth_kwargs)
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/transpiler/passmanager.py", line 196, in run
    return super().run(
           ~~~~~~~~~~~^
        in_programs=circuits,
        ^^^^^^^^^^^^^^^^^^^^^
    ...<3 lines>...
        property_set=property_set,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/passmanager/passmanager.py", line 239, in run
    _run_workflow(
    ~~~~~~~~~~~~~^
        program=program,
        ^^^^^^^^^^^^^^^^
    ...<3 lines>...
        **kwargs,
        ^^^^^^^^^
    )
    ^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/passmanager/passmanager.py", line 314, in _run_workflow
    passmanager_ir, final_state = flow_controller.execute(
                                  ~~~~~~~~~~~~~~~~~~~~~~~^
        passmanager_ir=passmanager_ir,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<3 lines>...
        callback=kwargs.get("callback", None),
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/passmanager/base_tasks.py", line 220, in execute
    passmanager_ir, state = next_task.execute(
                            ~~~~~~~~~~~~~~~~~^
        passmanager_ir=passmanager_ir,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        state=state,
        ^^^^^^^^^^^^
        callback=callback,
        ^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/passmanager/base_tasks.py", line 102, in execute
    ret = self.run(passmanager_ir)
  File "/Code/qiskit-experiments/.tox/qiskit-main/lib/python3.14/site-packages/qiskit/transpiler/passes/scheduling/alignments/check_durations.py", line 59, in run
    self.property_set["reschedule_required"] = run_instruction_duration_check(
                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        dag, self.acquire_align, self.pulse_align
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
qiskit.transpiler.exceptions.TranspilerError: 'The provided Delay duration is not in terms of dt.'