ORA-01427: single-row subquery returns more than one row

Summary:

While Importing Installed Base Assets in bulk using FBDI process, we are continuously getting this error. We are just trying to update around 25000 assets with another inventory organization. No other column is provided in the FBDI file except Batch Number, Asset Number, Action Code, Item Organization Code.

Can someone comment if this error has been resolved by anyone please? Error is below:

ORA-01427: single-row subquery returns more than one row