using go mod tidy, said something about a sumdb package (??). Then I go to Go/pkg/mod/cache/download and deletes sumdb folder there and I use go mod tidy and everything works fine!!!
yes, and it was working fine until i created a new project. This morning i checked an anrticule in medium (https://pub.huizhou92.com/go-1-26-changed-go-mod-init-and-nobody-asked-for-it-57ec19d909d1). I wrote the sample code and guess what ? Error because the version in go.mod is 1.25 and I am working with 1.26 (this particular sample refers to create pointers to a type with new syntax, say, x := new(42).
I guess my problem was caused for this, a differente version in mod and another version in your current working environment…