Hey all, I'm hoping someone can help RE: Magic Mover for Notes & Attachments.

I attempted to download it but received an error message. To resolve the error I have to "Enable Set Audit Fields." I found the directions to accomplish this but in reading the considerations I found: 

"Once enabled, you will be able to set these fields when creating new records. Since these fields are intended to be audit fields, you will only be able to set them on create, not update. If the records already exist in Salesforce, they will need to be exported to a .csv file, deleted in Salesforce, and then imported with the updated information as new records. 

In general, Salesforce recommends that this feature only be enabled while you are doing data migration. In certain cases (such as routinely copying new data from an external system to Salesforce) this can be enabled permanently. This feature must be enabled by an system administrator in the organization."

Does this mean every "created by" date in our database would be affected? Every caller intake [i.e. "lead object"] in our database has this and I want to ensure it won't be corrupted. In short, I think I need help in translating the emboldened part copied & pasted above. 

Thx!