problem in this file

[EliasSalom]

go-middleware-metrics/middleware/metrics.go

Line 17 in cf94ff2

func NewMetricsMiddleware() *MetricsMiddleware {

Hi,
I have tried exactly like your instruction in the video, but I get a lot of issues from this file,
please if you can to reviewed and check if everything is working perfectly,
Not exactly from this function but it's from this file

this is my error

panic: a previously registered descriptor with the same fully-qualified name as Desc{fqName: "myapp_processed_ops_total", help: "The total number of processed events", constLabels: {}, variableLabels: [method path statuscode]} has different label names or a different help string

and then I receive this

goroutine 1 [running]:
github.com/prometheus/client_golang/prometheus.(*Registry).MustRegister(0x0?, {0x140000a73c0?, 0x1, 0x0?})
        /Users/eliassalom/go/pkg/mod/github.com/prometheus/[email protected]/prometheus/registry.go:403 +0x88
github.com/prometheus/client_golang/prometheus/promauto.Factory.NewCounterVec({{0x104a19248?, 0x1400018eaa0?}}, {{0x0, 0x0}, {0x0, 0x0}, {0x10480e916, 0x19}, {0x104817184, 0x24}, ...}, ...)
        /Users/eliassalom/go/pkg/mod/github.com/prometheus/[email protected]/prometheus/promauto/auto.go:276 +0xf8
github.com/prometheus/client_golang/prometheus/promauto.NewCounterVec(...)
        /Users/eliassalom/go/pkg/mod/github.com/prometheus/[email protected]/prometheus/promauto/auto.go:176
gobid/internal/middleware.NewMetricsMiddleware()
        /Users/eliassalom/Desktop/Project/go-bid-hub/internal/middleware/metrics.go:18 +0x11c
gobid/internal/bidhandler.(*HttpServer).Start(0x140000d5d38, {0x14000094ac0, 0xb}, {0x14000094da0, 0x8}, {0x14000094bc0, 0xd}, {0x14000094b08, 0x4})
        /Users/eliassalom/Desktop/Project/go-bid-hub/internal/bidhandler/httpServer.go:31 +0x78
main.main()
        /Users/eliassalom/Desktop/Project/go-bid-hub/cmd/bidhubapi/main.go:24 +0x2e4
exit status 2