What does HRESULT 0x80280150 (TPM_20_E_BAD_CONTEXT) mean?

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A saved TPM context cannot be loaded as a valid current context.

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TPM_20_E_NV_DEFINED	TPM_20_E_CPHASH

TPM_20_E_BAD_CONTEXT

TPM_20_E_BAD_CONTEXT maps to TPM_RC_BAD_CONTEXT. The context presented to TPM2_ContextLoad is not valid. This is different from TPM_20_E_INTEGRITY: integrity reports a failed protected-data check, while this status means the context is not a valid loadable context for the TPM.

What to retain with a context

Associate saved contexts with the TPM instance, boot/reset epoch, handle type, and client session that created them.
Do not restore contexts after the conditions that invalidate them, such as a reboot or relevant TPM startup transition.
Flush stale state and create a fresh session or object context when the application can safely do so.

TCG TPM 2.0 Part 2: TPM_RC_BAD_CONTEXT · TCG TPM 2.0 Part 3: TPM2_ContextLoad

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