Hi AllSupport gave us a patch which has the formspub.tk.war and teamsite.tk.war.Replaced them with the Current one and ran a install_webapps.ipl which solved the Issue and was able to save the DCR
I'm on 7.3.2 RHEL and atleast I don't have errors when saving the existing DRC's.Infact on other case with I/A support I asked this question for migrating dependencies and support confirmed that associated files should able to pull all parent-child relations with DCR for ex. DCR and image.I can say 7.3.2 is having fix for original issue of this thread.