You deleted all my prepared roadmaps as part of the update of the Timelines tool. I do not know how it is possible to issue a new release without backward compatibility or informing users that they need to make a copy of the data somewhere else.
I hope that your support team is able to restore my data, as indicated in the screenshot and will contact me ASAP.

For me this data was critical and needed today  

I am infinitely upset, you destroyed the planning base, this is not a customer-oriented approach.