Convert items back to their original type
You can't undo an item conversion, but you can convert your item back to its original type. When changing back, the item receives a new identifier.
To convert an item back to its original type:
Use the same procedures you used to convert the item.
To determine if fields were lost in the conversion, select Versions in the side toolbar of Single Item View to open the bottom panel, then select Compare.
If any fields were lost, contact your organization admin to manually replace the lost fields.