A customer can only be linked to one discount code at a time. You can manage linked customers and link or unlink them by following these steps:

1. Go to the Discount Matrix in the dashboard.
2. Search for the discount code you want to link or unlink the customer to.
3. Click on the three dots next to the code and select Edit.
4. In the settings for the discount code, you can:
   • Search for a customer to link them.
   • See if a customer is already linked to another discount code and reassign them if needed.
   • View all linked customers.
   • Unlink a customer by clicking the X next to their name.

This way, you can easily manage which customers are linked to each discount code.