Creation Date in Absence Entries table differ even vacation was created on same date using HDL

Summary:

I have loaded the employees' scheduled vacation on 1 May 2025. When I query the table ANC_PER_ABS_ENTRIES, the creation date for some employees is not the same; it's showing 09 January 2025, but the last update date is the same, 1st May 2025, and updated by FUSION_APPS_HCM_ESS_LOADER_APPID
I can not understand this behaviour

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