Correction of personal data in an economy class ticket is a paid service. It should not lead to a complete replacement of the passenger originally indicated on the ticket, since name exchange is prohibited by the airline's rules. Recall that the spelling of the full name and other data in the ticket must be 100% the same as indicated in the passport
It is possible to make changes only before the end of the check-in time. Be careful when filling out the form, refunds for mistakenly issued applications are not made.
Other cases of passenger data changes are made only through a voluntary refund and issuance of a new ticket based on availability at the time of purchase.