Only you can do is:
1) You need to post correction through Item Journal (Negative Adjmt.):
BOOK1 (-1.700pcs)
BOOK2 (-225pcs)
2) You need to post correctly entries through Item Journal, again (Positive Adjmt.):
BOOK1 (+225pcs)
BOOK2 (+1.700pcs)
You cannot change quantites in Item Ledger Entry.