diff --git a/src/internal/context.go b/src/internal/context.go
index ea47ee1..ea806f8 100644
--- a/src/internal/context.go
+++ b/src/internal/context.go
@@ -14,27 +14,6 @@ var None = Context{
 	Mounts: make(map[string]string),
 }
 
-// Commented Load because we don't load a context from a file but will read a contextFile to get our Contexts
-
-// Load loads the context from given file
-// func Load(file string) (Context, error) {
-// 	var context Context
-// 	if !helpers.PathExists(file) {
-// 		return context, nil
-// 	}
-
-// 	buf, err := ioutil.ReadFile(file)
-// 	if err != nil {
-// 		return context, fmt.Errorf("loading context file: %w", err)
-// 	}
-// 	err = yaml.Unmarshal(buf, &context)
-// 	if err != nil {
-// 		return context, fmt.Errorf("unmarshalling yaml of context file %q: %w", file, err)
-// 	}
-
-// 	return context, nil
-// }
-
 // Clone returns a deep-copy of this context
 func (c Context) Clone() Context {
 	clone := c
diff --git a/src/internal/contextFile.go b/src/internal/contextFile.go
index fc4f2fd..38c460e 100644
--- a/src/internal/contextFile.go
+++ b/src/internal/contextFile.go
@@ -47,21 +47,18 @@ func Load(file string) (ContextFile, error) {
 
 // Clone returns a deep-copy of this context
 func (cf ContextFile) Clone() ContextFile {
-	contextFile := ContextFile{
-		Version: cf.Version,
-		Parent:  cf.Parent,
-	}
+	clone := cf
 	for key, value := range cf.NamedContexts {
-		contextFile.NamedContexts[key] = value.Clone()
+		clone.NamedContexts[key] = value.Clone()
 	}
-	return contextFile
+	return clone
 }
 
 // Merge creates a deep-copy of this context and copies values from given source context on top of it
 func (cf ContextFile) Merge(source ContextFile) ContextFile {
 	clone := cf.Clone()
-	if source.Version != 0 {
-		clone.Version = source.Version
+	if source.Version != clone.Version {
+		panic(fmt.Errorf("trying to merge contexts with incompatible versions %d and %d", clone.Version, source.Version))
 	}
 	if source.Parent != "" {
 		clone.Parent = source.Parent