Update or Change the Item Form to the one with Store Form with Record=T

I. Create a CSV Import file.
1. Navigate to Lists > Search > Saved Searches > New
2. Select Item
3. Set the Criteria
4. Under the Results tab, add Internal ID and Name.
5. Click Preview
6. Click Export - CSV

II.Set the new Item record form to be used as the new form.
1. Navigate to Setup > Customization > Entry Forms.
2. Edit/Customize the Item record form.
3. Make the necessary changes.
4. Mark the box Store Form with Record checked.
5. Click Save

III.Start the CSV import process.
1. Navigate to Setup > Import/Export > Import CSV Records.
2. Set Import type to Items.
3. Set Record Type to the type of Item being updated.
4. Click Select and choose the file for the import.
5. Click Next
6. Set Data Handling to Update.
7. Click on Advanced Options.
8. Set Custom Form to the one with Store Form with Record enabled.
9. Click Next
10. Map the Fields:
Internal ID <-> Internal ID
Name <-> Item Name/Number
11. Click Next
12. Enter Import Map Name and click Save & Run or simply click Run.