1. Open the Form Properties by clicking on the Properties button in the Form tab at the top of your Forms Designer window.
2. Click the Edit button next to Form ID.
3. You will receive a warning that changing the Form ID will impact any Folder, Workflow or Integration projects associated with the current form ID. If you are sure you want to change the ID, click Yes.
4. The Form ID field will now be editable. You can copy and paste the Form Template ID for the Form you want to overwrite into the Form ID field.