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Am having a SPO site,with SPList with 5300 items and one of the fields must be a unique field. But, because since its crossed 5000 items, i am unable to make the field as unique field. This field is a single line of text

when i tried to make the field as Enforce Unique values am getting the below error:

the attempted operation is prohibited because it exceeds the list view threshold enforced by the administrator.

How to perform this uniqueness for this field

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The typical, unfortunate guidance has been to get rid of enough items to get the list below 5000, make your change, and add them back in.

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  • after deletion of those items , how can i get back ? is it reside in recyclebin and can i take it back from recycle bin , just by restore items?
    – userAZLogicApps
    Apr 27 '18 at 12:47
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    The recycyle bin might work, in theory, but I certainly wouldn't recommend it as a strategy. Instead, perhaps save the list as a template (from list settings), then copy over a few hundred records. After making the field unique, you could then copy them back. Of course, this will mess with the modified date and modified by fields. If this is a problem, tools like sharegate can move list items around while preserving these fields.
    – Mike2500
    Apr 27 '18 at 12:51
  • Is there any easy way for "then copy over a few hundred records."... in my case, each and every listitem has attachments. So, will these attachments also move to a 2nd splist (copied list)
    – userAZLogicApps
    Apr 27 '18 at 14:02
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    Attachments does complicate it a bit. Go to site settings --> content and structure, click on your list on the left side. In the right panel, select some list items and actions--> move. Move them to a different list (that you created via a list template, so that it has all the same fields, etc.) Clearly, test this on a different, non-production list first.
    – Mike2500
    Apr 27 '18 at 14:52

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