HI maria.
The stock is 921 interim storage type which is used for Sloc- Sloc stock tranfers 321 mov type. in some cases of scenario its will be both source and destination storage type ,in that case post change notice will be generated instaed of TR, so please do to with refernce to Post change notice. then stock will be cleared from 921. T.code LT05.
Thanks ,
Karthik Ayyala