How to find backed out life event

Summary:

There was a data migration task where we need to process the life event and load the enrollment data using HDL process and after doing this process the life event was backed out. Not sure why the life event was backed out for 497 employees.

Content (required):

Please let me know how to find, why the life event was backed out or to find who backed out the life event.

Is there any way to find user or the process which caused to back out the life event.

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