[Hardware Error]: MC1 Error: Copyback Parity/Victim error

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Sample error:

Message from syslogd@  at Wed Jan  7 21:33:20 1970 ...
: [567260.524865] [Hardware Error]: cache level: L1, tx: INSN, mem-tx: EV

Message from syslogd@  at Wed Jan  7 21:33:20 1970 ...

Message from syslogd@  at Wed Jan  7 21:33:20 1970 ...

Message from syslogd@  at Wed Jan  7 21:33:20 1970 ...
:::   [567260.524863] [Hardware Error]: MC1 Error: Copyback Parity/Victim error.[567260.524861] [Hardware Error]: CPU:0 (10:4:2) MC1_STATUS[-|CE|-|-|-]: 0x9000000000000171[567260.524856] [Hardware Error]: Corrected error, no action required.

You may edit this wiki page if you have any idea what this means, and what this may indicate (imminent failure of some component?