diff --git a/app/controllers/asset_sync_controller.rb b/app/controllers/asset_sync_controller.rb
index 1eff86d04..5cf619ccc 100644
--- a/app/controllers/asset_sync_controller.rb
+++ b/app/controllers/asset_sync_controller.rb
@@ -24,7 +24,13 @@ class AssetSyncController < ApplicationController
   end
 
   def update
-    head(:conflict) and return if @asset_sync_token.conflicts?(request.headers['VersionToken'])
+    if @asset_sync_token.conflicts?(request.headers['VersionToken'])
+      render(
+        json: AssetSyncTokenSerializer.new(conflicting_asset_copy_token).as_json,
+        status: :conflict
+      )
+      return
+    end
 
     @asset.file.attach(io: request.body, filename: @asset.file.filename)
     @asset.touch
@@ -34,6 +40,26 @@ class AssetSyncController < ApplicationController
 
   # private
 
+  def conflicting_asset_copy_token
+    Asset.transaction do
+      new_asset = @asset.dup
+      new_asset.save
+      new_asset.file.attach(
+        io: request.body,
+        filename: "#{@asset.file.filename.base} (#{t('general.copy')}).#{@asset.file.filename.extension}"
+      )
+
+      case @asset.parent
+      when Step
+        StepAsset.create!(step: @asset.step, asset: new_asset)
+      when Result
+        ResultAsset.create!(result: @asset.result, asset: new_asset)
+      end
+
+      current_user.asset_sync_tokens.create!(asset_id: new_asset.id)
+    end
+  end
+
   def authenticate_asset_sync_token!
     @asset_sync_token = AssetSyncToken.find_by(token: request.headers['Authentication'])
 
diff --git a/app/models/asset.rb b/app/models/asset.rb
index 1429f6a11..1c6387828 100644
--- a/app/models/asset.rb
+++ b/app/models/asset.rb
@@ -466,6 +466,10 @@ class Asset < ApplicationRecord
     (result || step)&.my_module
   end
 
+  def parent
+    step || result || repository_cell
+  end
+
   private
 
   def tempdir
diff --git a/config/locales/en.yml b/config/locales/en.yml
index bdb781e4a..773218f9e 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -3690,6 +3690,7 @@ en:
     edit: "Edit"
     delete: "Delete"
     cancel: "Cancel"
+    copy: "Copy"
     duplicate: "Duplicate"
     okay: "Okay"
     back: "Back"