Impossible to change quote dates


For an existing quote it’s impossible to change the creation date or expiring date even by changing the status from “sent” to “draft”.
The error message says “looks like something is blocked because of an error”.

IP 1.4.6

I started to have the same issue. Thought it was a bug from version 1.5.9 but I’m now using the latest version and it keeps doing the same thing.