Could you please tell me how to solve this problem?

[sujunbo]

go get: github.com/go-zeromq/zmq4@v0.6.0 requires
github.com/zeromq/goczmq/v4@v4.2.1: reading github.com/zeromq/goczmq/go.mod at revision v4.2.1: unknown revision v4.2.1

[sbinet]

this should be fixed with v0.6.2.

thanks for the report!

(feel free to reopen otherwise.)