How to remove this message?

[vidhya_mouli]

I have made an existing catalog item public. When a guest user submits the request, a record is entered in the table. However I get this message 

How to avoid this?

[hari59]

Hi,

This issue with user list, Those user's are inactive.

Thanks,

Harish.G

[Mark Manders]

You get that message because there is no valid 'requested for' (it's not a user in the system).

[vidhya_mouli · Accepted solution]

Managed to fix this issue by creating a guest user in the portal.