qiskit/releasenotes/notes/2.0/fix-assign-parameters-ffa28...

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---
fixes:
- |
Fix incorrect behavior in :class:`.CircuitData` in which, upon parameter assignment,
we attempted to modify the cached operation inside of a ``PackedInstruction``. Now
we instead discard said cache prompting the ``PackedInstruction`` to build a new Python
operation should it be needed.