when I want to upload an Apex class, gives me the following error:

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System.DmlException: Insert failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Faltan campos obligatorios: [C_digo_del_Producto__c]: [C_digo_del_Producto__c]

Class.TesttriggerSaleDetail.myUnitTest: line 32, column 9 

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