System Error if user trying submit web content based on web form which was deleted
Steps to reproduce:
1. create a web Project
2. create any web form
3. add web form to web project.
4. create web content based on web form
5. goto Data Dictionary>Web Forms space and delete the web form
6. Open the Web Project and try to submit the content based on the deleted web form
Expected result: Submit Items page correctly displayed, user able to submit the content.
Actual Result:System error appears (please see attached log file and screen shot)