diff --git a/lti2_tc/app/models/lti2_tc/tool_registration.rb b/lti2_tc/app/models/lti2_tc/tool_registration.rb
index 59eeddd..6403e36 100644
--- a/lti2_tc/app/models/lti2_tc/tool_registration.rb
+++ b/lti2_tc/app/models/lti2_tc/tool_registration.rb
@@ -24,7 +24,6 @@ def self.register_tool( user, deployment_request, tool_consumer_profile_wrapper,
       # Only comment out to test old-style ('late') tool_proxy_guid creation
       tool_proxy_guid = UUID.generate
 
-      deployment_request.tool_proxy_guid = tool_proxy_guid
       deployment_request.status = 'submitted'
       deployment_request.save