change item from old to new will conflict proplem

I have some proplem in specified item in item card so that i create new items then transfer transaction found in old item and blocked it then put in new question are this will make conflict between old item and new item because when i search in database this blocked item will show or items availables it also will show

You put filter on Item list for not showing blocked item.

From item journal i will transfer transaction one by one are there are any way to transfer more transactions by one step and more quick because this item i want to transfer it has big transactions more than 30 entries. so that i need way not let me add 30 entry one by one

You can upload the transactions via dataport in Item Journal table and then post it

You can enter multiple transactions and then post it at one go.