What is the proper Epson WF-4640 firmware?

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Mar 24, 2023
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Epson site siad I should update my firmware to 50.12.GG09I2 and lists that as the latest and only firmware. When I tried to update, update showed status of "Downgraded (It cannot be updated)" and printing a printer status sheet it seems my firmware is at Main Firmware level GG30KA and Network Firmware at 51.15 so is that indeed newer firmware? Odd the Epson site does not list it as the latest firmware. Can someone explain please? Thanks!
 

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