Cannot removed failed SSD

I'm trying to remove a failed SSD (to replace it short term - we're in a migration to AWS that will complete in ~6 weeks)

The web client won't let me remove the group - it shows an error as attached.

If I put the host in maintenance mode and try with the CLI I get the error below

esxcli vsan storage remove -u 52317d1d-b65c-d898-307f-d38adf7ec1a3

Unable to remove device: Failed to write partition

In VSAN config the status of the group is showing as attached - the SSD failed (IO errors) and data was rebuilt, there is currently nothing using these disks.

How can I remove the disk to replace it with a new SSD?

Thanks

Alain