Sonoff Zbbridge EZSP - Flash issue

[neilfx1]

I accidentally flashed the wrong version of EZSP to my Sonoff Zbbridge (original not pro). As a result, I get this now on boot:

16:20:12.838 ZIG: Resetting EZSP device
16:20:14.125 MQT: tele/zgb_bridge/RESULT = {"ZbState":{"Status":1,"Message":"EFR32 EZSP booted","RestartReason":"Power-on","Code":2}}
16:20:14.127 ZIG: ZbEZSPSend 000008
16:20:14.168 ZIG: {"ZbEZSPReceived":"00000D023074"}
16:20:14.186 MQT: tele/zgb_bridge/RESULT = {"ZbState":{"Status":55,"Version":"7.4.3.0","Protocol":13,"Stack":2}}
16:20:14.217 MQT: tele/zgb_bridge/RESULT = {"ZbState":{"Status":98,"Message":"Only EZSP protocol v8 is currently supported"}}
16:20:14.254 MQT: tele/zgb_bridge/RESULT = {"ZbState":{"Status":99,"Message":"Abort"}}
16:20:14.256 ZIG: Abort

I've tried to upload the previously installed version (6.7.8) however no matter how many times I upload it, nothing happens. It gets this far and then stops:

16:38:17.860 HTP: Firmware Upgrade
16:38:22.790 UPL: File ncp-uart-sw_6.7.8_115200.ota (190756 bytes)
16:38:23.056 CFG: Saved to flash at 1FB, Count 549, Bytes 4096
16:38:23.073 UPL: File type 5
16:38:25.583 UPL: Progress 100 KB
16:38:27.583 UPP: Multicast (re)joined
16:38:27.585 UPL: Transfer 190756 bytes
16:38:27.585 UPL: Successful 190756 bytes
16:38:27.597 HTP: Upload transfer

Manually restarting:

00:00:00.004 UFS: FlashFS mounted with 208 kB free
00:00:00.039 CFG: Loaded from File, Count 549
00:00:00.046 ZIG: ZBBridge EEPROM found at address 0x50
00:00:00.047 SNS: Hardware Serial
00:00:00.048 SRC: Restart
00:00:00.049 Project tasmota - zgb-garage Version 14.4.1.1(b7da75d-zbbridge)-2_7_8(2024-12-18T21:50:40)
00:00:00.049 ZIG: Resetting EZSP device
00:00:00.050 ZIG: Loading Zigbee data
00:00:00.075 ZIG: EEPROM signature 0x6D736154 is correct
00:00:00.078 ZIG: Zigbee device information found in File System (6 devices - 188 bytes)
00:00:00.084 ZIG: Zigbee device data in EEPROM (141 bytes)
00:00:00.135 ZIG: ZbLoad '<internal_plugin>' loaded successfully

Which then comes back with the same incompatible version installed message. I'd like to force update the flash, is there anything I can do here? I tried the various other suggestions I've seen on here except a factory reset which I'd rather not do if I can.

[s-hadinger]

Not sure what you can do here. A factory reset will not restore the factory firmware anyways