cisco 7200 router crash info

A 7200 router has crashed with the following crash info information:

%ERR-1-GT64120 (PCI-0): Fatal error, Memory parity error (external)
 GT=0xB4000000, cause=0x0100E283, mask=0x0ED01F00, real_cause=0x00000200
 bus_err_high=0x00000000, bus_err_low=0x00000000, addr_decode_err=0x00000470

%ERR-1-SERR: PCI bus system/parity error
%ERR-1-FATAL: Fatal error interrupt, reloading
 err_stat=0x81, err_enable=0xFF, mgmt_event=0x0

What can this mean?
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You have a SDRAM memory error:

This could be due to faulty memory or hardware failure on the processing engine board. You could hope that it's due to a bad contact and simply re-seat the memory in its socket (remember to use an anti-static strap).

Depending on your Network Processing Engine (NPE), memory configurations differ:

If re-seating doesn't fix the problem, then the memory will need to be replaced. If this doesn't fix the problem then you'll need to replace the NPE.

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