V 2_1 to V2_7 and more
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Chen32220 commented
Hello,
i am in V2_1 and i could update to 2-7 for 3. an more.
How to do?
Best regards
patience4711 commented
You are far behind. I think it is best to burn the latest sd-card image. If you can backup your database you can restore it to your new system.
Please read here