TCP checksum is regarded as incorrect by wireshark, but still accepted by TCP stack

[wen lui <esolvepolito () gmail com>]

I captured a TCP connection packets on a virtual NIC(openvpn)
I notice for some TCP packets, the TCP checksum is wrong(hilighted as red)
but still these packets are accepted by TCP stack (they got ACKed)
why?

maybe the wireshark TCP checksum detection is wrong?
or TCP stack doesn't care TCP checksum?
thanks!

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