go编译.proto文件

Question

const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)

go利用 protoc 编译.proto文件后提示Const initializer 'protoimpl.EnforceVersion(20 - protoimpl.MinVersion)' is not a constant？

这是什么原因造成的？