We have a list which has number sequence, lets say 10001. I have updated the create new document set aspx page – so when we open the open the page to create a new document set the last sequence is fetched and a field is filled with the number on the page, as soon as the page is saved, the list is updated with a new number – in this case 10002. And then the document set is created with the id 10001. Now the problem is that if multiple users open the page at the same time, same sequence number is fetched and we have a problem, how can we avoid the concurrency issue?
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