Hi @ame54 ,
Firstly I would like to know about fixing the original analysis. So when you delete any dataset, the related visuals error out. However if you again add the dataset, the visuals get reloaded. What was the error when you tried this step?
As the alternate process which you suggest, updating existing dashboard with new analysis, I am aware that it is not achievable through console but through cli commands. You can refer to the solution in this query for the step by step detailed process.
Thanks,
Prantika