If you update the product name and product category in the Inventory module in Odoo 15, there can be an impact on the current data in other modules such as Invoices and Repairs.

Here are some potential impacts you may encounter:

1. Invoices: If you update the product name or category in Inventory, it may affect the product name or category on existing invoices that use the product. The invoice lines may need to be updated to reflect the changes in the product name or category.

2. Repairs: If you have any active repairs that use the product with the old name or category, updating the product name or category may affect the repair order. The repair order lines may need to be updated to reflect the changes in the product name or category.

3. Reports: If you have any reports that use the product name or category as a filter or group by criteria, updating the product name or category may affect the accuracy of those reports.

4. Third-party integrations: If you have any third-party integrations that use the product name or category, such as an e-commerce website, updating the product name or category may affect the integration and require changes to the integration.

Therefore, it is important to carefully consider the impacts of updating product name or category in Inventory and plan accordingly. If possible, it may be a good idea to first test the changes on a development or staging environment before making the changes on the production environment to ensure that any potential issues can be identified and resolved beforehand. Additionally, you may want to communicate the changes to any affected users or stakeholders, such as customers or vendors, to avoid any confusion or misunderstandings.