ACPI-related warning on boot

I getting ACPI-related warning when system loads.

Code:
acpi0: <7642MS A7642100> on motherboard
acpi0: [ITHREAD]
ACPI Error (dswload-0772): [PCI0] Namespace lookup failure, AE_NOT_FOUND
ACPI Exception: AE_NOT_FOUND, During name lookup/catalog (20100331/psloop-326)
ACPI Error (psparse-0633): Method parse/execution failed [\\] (Node 0xffffffff8073c880), AE_NOT_FOUND

Full dmesg is here.

What does it means and how to fix?
 
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