Hi Naresh ,
Can you please reach to Customer care for this specific issue with more details like :
- All the fields that are used to save the feed
- if this particular case is failiong oe all feeds are giving the error
- Steps used for the creation of feed
To contact Customer Care by telephone, call 1-800-497-0335. Toll free numbers outside the United States can be found at http://helpx.adobe.com/marketing-cloud/contact-support.html. When asked to select an option for your product, press 3 to contact the Target team.
E-mail Customer Care at tt-support@adobe.com.
Thanks & Regards
Parit Mittal