Transition/update from unf 1.6.11.1 to BAS 1.6.20.2

Updates are done! and the base became unfunctional, which I could not even guess, no warning was!
This needs to be warned, and to talk in advance, to explain the needs of the customer!

He performed the task. The only thing that didn’t consider that the client had an old platform. I proposed clearly as an additional task to perform the platform update and re-publishing, in response I heard that I had to say it immediately)
The price of customers who appreciate the work and time of other people and understand that if the nuance appeared then everything is solved not always within the budget of the current TZ