[veber-alex]

According to the docs[0] you can't declare a go version in the main module or workspace that is lower then the go version of one of your dependencies.

  A module’s go line must declare a version greater than or equal to the go version declared by each of the 
  modules listed in require statements. A workspace’s go line must declare a version greater than or equal 
  to the go version declared by each of the modules listed in use statements.
  
  For example, if module M requires a dependency D with a go.mod that declares go 1.22.0, then M’s go.mod 
  cannot say go 1.21.3.

so the "go" directive is like "rust-version" in Cargo.toml and the "toolchain" directive is like the rust version in a rust-toolchain file.

[0]: https://tip.golang.org/doc/toolchain