Saving dashboard causes dissapearing it

Using 3.0.1, I believe our repository has been shuffled from test to production servers which may have changed the Public URL. Our users were never in the web interface as all work was carried out in Eclipse. Now we are starting a management of documents area, we need the Web interface to satisfy casual users.

Dashboards do function, however any changes or creations are not persistent! Someone can create a personal dashboard, click to a project dashboard, make a change, personal dashboard has disappeared!

I've seen guidance on using https://Jazz-Server.com/jts/dashboard-admin but I don't know the previous Public URL!

I've also seen that using repotools to delete the dashboard area could fix it (deleteJFSResources). However a lot of guidance on PublicURL change includes trying -reIndex as a 1st attempt.

I have a rare oppurtunity coming up with everyone off the system, so I've set myself the task of fixing this after a lot of backups happen.

Any guidance or experience would be greatly appreciated!

Cheers