Thanks for quick reply. Ok, so general approach is in 781802: do not re-use number ranges after data archiving. This might be stupid question, but I would like to understand it: if number ranges cannot be re-used, what happens if document numbers exceed the range? Is it even possible? And how is such situation solved when data archiving is in place?
Let me one more question: Is there more recommendations or notes related to data archiving and number ranges which you use? For example in case of Material documents, I do follow 83076 - archive MM_ACCTIT before MM_MATBEL...