TPM_E_PCP_PLATFORM_CLAIM_REBOOT

Code: 0x40290426 (1076429862)

As HRESULT:

S: 0 (Success)
R: 1 (Reserved, must be clear in a well-formed HRESULT)
C: 0 (Microsoft-defined)
N: 0 (Not an NTSTATUS value)
Facility: 0x029 (FACILITY_TPM_SOFTWARE: Trusted Platform Module applications)
Code: 0x0426 (1062)

As NTSTATUS:

Sev: 1 (STATUS_SEVERITY_INFORMATIONAL)
C: 0 (Microsoft-defined)
Facility: 0x029 (Unknown facility)
Code: 0x0426 (1062)

Documented in Win32

COM Error Codes (TPM, PLA, FVE) (winerror.h): 0x40290426

The platform claim is for a previous boot, and cannot be created without reboot.