Hi geoffrey,
I can show you how to solve this but i can't honestly tell you the impact in other related models. So, i suggest you do this in a test DB !!
1- Go to POS/00718, Then Add field "statement_ids" to your form view ( it does not exists by default, you can add it via debug mode).
2- This field refers to "Cash Statements" and you will find some records in it.
3- For records that have status != "New", click to open Popup and then click on Action button Reset To until the status Becomes "New"
4- Do step 3 for the next record having status != new
5- once all records have status == "New", you can close the session.
Hope this helps.
Regards.