Device bricking 21.02.0 mikrotik 750gr3

after install from sysupgrade firmware via Luci, device no longer accessible
reverted with netinstall of mikrotik installed firmware from start and reapply openwrt worked

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Any particular version of mikrotik firmware?

previous firmware was openwrt 19.07

Changing from 19 to 21 requires not saving the network settings. Importing a swconfig based configuration to a DSA system will make the Ethernet ports inaccessible.

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