Sharkbook - cannot merge individuals

Sharkbook

I have been able to merge a number of shark individuals, but something is stopping these two from merging:

SHARK1: GNS-1292 needs to be merged with GNS-1193

https://www.sharkbook.ai/merge.jsp?individualA=dfdea59c-4541-4944-8893-2e7192af4c42&individualB=4b478099-f4eb-4de0-8e09-1b619af417ba

SHARK 2: GNS-1739 needs to be merged with GNS-0082

https://www.sharkbook.ai/merge.jsp?individualA=c6167e95-4626-4cb1-877f-ed65d76d05e4&individualB=c50d8a53-464f-41e9-a6c6-c61f105ef0da

Can you give it a try and see what is preventing it?