If you would like to be able to update your Assets when you submit a new form, then you can do this by adding an Update Asset Action to the form template.
This will use the Asset tables in your form, to update the Asset information when the form is Submitted.
In order to add an Email Action to your Form, go to Forms > Existing Templates > choose the edit arrow for the template you would like the action added to > Actions tab > + New Action. Then you can select Update Asset in the Action type dropdown.
Save Actions, and then with this set up, whenever you fill out a new form with updated Assets, it will update it in the Assets Register as well.
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