Restore Stock Firmware - TP-Link Archer A7v5

Trying to get the stock firmware reinstalled on my TP-Link Archer A7v5, but when I upload the file via TFTP, the checksum keeps failing. I've tried multiple versions of the firmware, but they all result in the same thing.

U-Boot 1.1.4-gc995e2b7-dirty (Jul 14 2020 - 22:22:06)

ap152 - Dragonfly 1.0

DRAM:  128 MB
Top of RAM usable for U-Boot at: 88000000
Reserving 408k for U-Boot at: 87f98000
Reserving 16448k for malloc() at: 86f88000
Reserving 44 Bytes for Board Info at: 86f87fd4
Reserving 36 Bytes for Global Data at: 86f87fb0
Reserving 128k for boot params() at: 86f67fb0
Stack Pointer at: 86f67f98
Now running in RAM - U-Boot at: 87f98000
Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x18
flash size 16MB, sector count = 256
Flash: 16 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ath_gmac_enet_initialize...
No valid address in Flash. Using fixed address
ath_gmac_enet_initialize: reset mask:c02200 
athr_mgmt_init ::done
Dragonfly  ----> S17 PHY *
athrs17_reg_init: complete
SGMII in forced mode
athr_gmac_sgmii_setup SGMII done
: cfg1 0x80000000 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
eth0 up
eth0
Setting 0x181162c0 to 0x40802100
run command setenv serverip 192.168.0.66;setenv ipaddr 192.168.0.86
run command tftp 0x80060000 ArcherC7v5_tp_recovery.bin
Trying eth0
dup 1 speed 1000
Using eth0 device
TFTP from server 192.168.0.66; our IP address is 192.168.0.86
Download Filename 'ArcherC7v5_tp_recovery.bin'.
Download to address: 0x80060000
Loading: ################################
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done
Bytes transferred = 15677994 (ef3a2a hex)
Firmware downloaded... filesize = 0xef3a2a fileaddr = 0x80060000.
Firmware Recovery file length : 15677994

Firmware process id 2.

handle_fw_cloud 138

Image verify OK!

Firmware file Verify ok!

[Error]sysmgr_proinfo_buildStruct():  659 @ unknown id(device_name), skip it.

[Error]sysmgr_proinfo_buildStruct():  659 @ unknown id(country), skip it.

[Error]sysmgr_proinfo_buildStruct():  659 @ unknown id(hw_ver), skip it.

[Error]sysmgr_cfg_checkSupportList(): 1023 @ specialId 45550000 NOT Match.

Firmware supports, check OK.

 (curFw_ver, newFw_ver) == (7.0, 1.2) 

[NM_Error](nm_checkSoftVer) 00962: Firmwave not supports, check failed.

[NM_Error](nm_checkUpdateContent) 01219: the firmware software version dismatched

[NM_Error](nm_buildUpgradeStruct) 01314: checkUpdateContent failed.

recovery failed.
now restart...

I can boot back into OpenWRT, so the system isn't bricked, but not able to get any stock firmware loaded back onto the system.

I think I read I need to modify some of the header info in the firmware, but I can't find the details. Any help would be apprecited.

Disclaimer: Just providing the link. It is up to you to decide whether to use this method or not.

https://forum.openwrt.org/t/archer-a7-v5-not-able-to-revert-to-factory-firmware-using-tftp/127750/23 - #by Terabits