Error in Revaluation

supremo

I received this message while revaluing items: The item xxxx cannot be revalued because there is at least one open Outbound Item Ledger Entry.

What should I check to make this revaluation work?

Thank you.

Sog

You've moved/sold/whatever some items that were not balanced with an income of said item.
FIlter item ledger entries on open yes and quantity <0.
That's the source, but not the way to fix it.