If the table data in the invoice template is displaying in reverse order, you can try the following steps to resolve the issue:

1. Open the invoice template in the Odoo Studio app or in the code editor.

2. Locate the table code in the template and check if the rows are being generated in reverse order.

3. If the rows are being generated in reverse order, you can try reversing the order of the data being passed to the table in the template code.

4. If the issue persists, you can check if there are any custom modules or code that may be causing the issue.

5. Try resetting the invoice template to its default settings and see if the issue is resolved.

6. If none of the above solutions work, you may need to contact Odoo support or a developer for further assistance with troubleshooting the issue.

It is also worth noting that the order of data in the table may be affected by the order of the records in the database. You can try sorting the records in the database in the desired order and see if that resolves the issue.