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Malik ThummalapalliMalik Thummalapalli 

Error: There is already a field named Discount_Percentage on Opportunity.

Error: There is already a field named Discount_Percentage on Opportunity. 

'
 how to solve the problem
Arun Kumar 1141Arun Kumar 1141

Hi Malik,

It suggests that you are trying to create a custom field with the name "Discount_Percentage" on the Opportunity object in Salesforce, but there is already a field with that name in your Salesforce org.
In Salesforce, you cannot create two custom fields with the same API name on the same object. Each custom field must have a unique API name within its object. API names are case-insensitive and must be unique, and they are used to reference fields in code, queries, and API integrations.

You can try following these steps:-

  • Rename the Custom Field
  • Delete the Existing Field with same api name.

I hope this will help you.

Thanks!
SwethaSwetha (Salesforce Developers) 
HI Malik,

This error message indicates that there is already a field named "Discount_Percentage" on the Opportunity object in Salesforce, and you are trying to create another field with the same name.

To solve this problem, you need to either rename the existing field or choose a different name for the new field you are trying to create. You can rename the existing field by going to the Object Manager in Salesforce, selecting the Opportunity object, and then selecting Fields & Relationships.From there, you can find the existing Discount_Percentage field and rename it to something else.

Alternatively, you can choose a different name for the new field you are trying to create.

Related:https://help.salesforce.com/s/articleView?id=sf.admin_insufficient_privileges_object.htm&type=5

If this information helps, please mark the answer as best. Thank you