One possible reason why the before trigger fails is that the code could be trying to create duplicates in the archive when it is unable to. A before trigger is a type of trigger that executes before a record is saved and can be used to validate or modify record data. In this case, the before trigger is supposed to save the original version of a record to an external database before it is updated or deleted in Salesforce. However, if the code does not handle errors or exceptions properly, it could try to create duplicate records in the external database when it is not allowed or possible. This could cause the trigger to fail and prevent the record from being saved in Salesforce. Reference: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_triggers.htm https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_triggers_context_variables.htm