Unable to update Created Date/Time even via upsert

Unable to update Created Date/Time even via upsert

hi all --- running a demo version and "recreating" some data from hubspot.  I had tried the method to automatically move data over but it missed A TON of fields and some stuff wouldn't even map correctly so i am simply creating new Deal records to test some things.   I am trying to update the created date/time in Zoho CRM but the field will not let me do so.  Instead, i exported my data and simply updated the Created Time field in the extract with the correct date and time and then performed an update by deal ID.  problem is the date/time did not update.

how can i make corrections to the created date/time in zoho crm?

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