Cannot delete or sell relic items in bag

[evegorust66]

How can I sell or delete the Grade I Relic I circled in red as shown in the image? The trade status is Impossible. This useless item is taking up space in my bag.

 

[Prowler]

You can combine it into shard if combined with gold catalyst

 

[evegorust66]

Thank you

You can combine it into shard if combined with gold catalyst

Thank you!