whea warning?

I just noticed a whea warning in my event log stating a hardware error was corrected and it was reported by a cpu core. the error type was a cache hierarchy error. i know OCing can cause some of these whea errors, and it seems most people just ignore them, but im just wondering if this one is anything to worry about. my processor is overclocked, but i can pass numerous stress tests for hours, without any issues or errors in the even log. i think the pc my have even been idle at the time this was reported , or i was gaming . But again usually there are no errors regardless of what the pc is doing.
anyway, i was just wondering if anyone had some info on this error since googling it comes up with a bunch of different whea errors and no real explanation other than ocing can cause them.

Computer is:
8700K stock, MTE on, 4700mhz auto clock
Asus Z370 Pro Gaming
16GB DDR 3000MHZ ( XMP ON)
Gtx 1080 Ti Aorus
Corsair 750 Rmi
SSD Crucial 525GB
HDD TOSHIBA 500GB
Windows 10 clean install 1709 Creator Fall Update ( 16299.15 build october 2017 ,before meltdown/spectre patch )
All settings in UEFI are stock,defaulted . Only XMP profile is on.

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Its entries from 21.01.2018( used was 16299.15 build october 2017 ,before meltdown/spectre patch ):






And entry from 16.03.2018:



WHEA-LOGGER 19 Error Type: Cache hierarchy error.

Is my 8700K faulty? It happened onlt in these two days. In other days no whea-loggers.