Hi @OET_Production,
Format id=“{00000000-0000-0000-0000-000000000000}” should be a unique identifier of your template. For your personal purposes, it is completely sufficient to change few zeros to a number, e.g. {00000000-0000-0000-0000-000000000001}. However, if you want to share your template, then this value should be unique and you should use an online GUID generator. Please also note that the body string is also substituted and it just includes your template file.
Also, the descID should be unique and not used in any other XML file. Basically you can add +1000 to the number you see now.