qiskit/releasenotes/notes/1.0/fix-v2-conversion-with-defe...

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---
fixes:
- |
A bug where :func:`.convert_to_target` and :class:`.BackendV2Converter` raised an unexpected
error was solved. The bug occurred when the backend to convert included calibrations
for a gate that didn't have a definition in the backend properties.
Such gate is now broadcast to all qubits as an ideal error-free instruction,
even when calibrations for a finite set of qubits are reported.
upgrade_providers:
- |
The :class:`.BackendProperties` and :class:`.PulseDefaults` model objects used by the
:class:`.FakeOpenPulse2Q` have been updated to be internally consistent and add missing
instructions. If you were relying on the previous model objects as a compilation target you can
use the backend with Qiskit 0.46 and export a :class:`.QuantumCircuit` generated with
:func:`.transpile` and serialize it using :class:`.qpy.dump` to access it in this release.