You can have more than one supplier for an ingredient. To add multiple suppliers for an ingredient:

Step 1: Visit Setup > Inventory Setup > Ingredients & Sub Recipes.
Step 2: Search for the ingredient you want to update using the search field.
Step 3: Click the Edit button.
Step 4: Scroll to the Suppliers section and add the supplier's details.
Step 5: Select the default supplier for that ingredient and click Update.