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Carlos ArribasCarlos Arribas 

Is it possible to change a big object index?

We need to modify just one field in the index of a big object. I know that it's not possible change this index once deployed but anyone knows it's possible to contact Salesforce and request the change?

Thanks!
Sai PraveenSai Praveen (Salesforce Developers) 
Hi Carlos,

As per the below article 

https://help.salesforce.com/s/articleView?id=sf.custom_bo_create.htm&type=5 (https://help.salesforce.com/s/articleView?id=sf.custom_bo_create.htm&type=5)
 
Once you’ve created an index and deployed a big object, you can’t edit or delete the index. To change the index, you must start over with a new big object.

If this solution helps, Please mark it as best answer.

Thanks,