diff --git a/lib/autoload/kuroko2/workflow/task/fork.rb b/lib/autoload/kuroko2/workflow/task/fork.rb
index 00181900..98d144d0 100644
--- a/lib/autoload/kuroko2/workflow/task/fork.rb
+++ b/lib/autoload/kuroko2/workflow/task/fork.rb
@@ -43,9 +43,9 @@ def extract_child_nodes
         end
 
         def create_child_token(child_node:, env: {})
-          attributes = token.attributes.except('id', 'uuid', 'script', 'path', 'message', 'created_at', 'updated_at')
-          attributes = attributes.merge(uuid: SecureRandom.uuid, parent: token, script: child_node.to_script, path: '/')
-          attributes['context']['ENV'] = (attributes['context']['ENV'] || {}).merge(env)
+          attributes = token.attributes.except('id', 'uuid', 'script', 'path', 'message', 'created_at', 'updated_at', 'context')
+          attributes = attributes.merge(uuid: SecureRandom.uuid, parent: token, script: child_node.to_script, path: '/', context: token.context.deep_dup)
+          attributes[:context]['ENV'] = (attributes[:context]['ENV'] || {}).merge(env)
 
           Token.create!(attributes).tap do |created|
             fork_children_ids << created.id
diff --git a/spec/workflow/engine_spec.rb b/spec/workflow/engine_spec.rb
index abc005ee..346c0a62 100644
--- a/spec/workflow/engine_spec.rb
+++ b/spec/workflow/engine_spec.rb
@@ -126,6 +126,7 @@ module Kuroko2::Workflow
             parallel_fork: 3
               noop: noop1
               noop: noop2
+            noop: noop3
           EOF
         end
 
@@ -173,6 +174,13 @@ module Kuroko2::Workflow
           expect(parallel_tokens.map(&:path)).to all(eq('/0-sequence/1-noop'))
           expect(parallel_tokens.map(&:status_name)).to all(eq('finished'))
 
+          subject.process(token)
+          expect(token.path).to eq '/2-noop'
+          expect(token.status_name).to eq 'working'
+          expect(token.context['ENV']['GLOBAL_ENV']).to eq('g')
+          expect(token.context['ENV']['KUROKO2_PARALLEL_FORK_SIZE']).to be_nil
+          expect(token.context['ENV']['KUROKO2_PARALLEL_FORK_INDEX']).to be_nil
+
           subject.process_all
           expect(Kuroko2::Token.all.count).to eq 0
         end