Is it possible to change the message type of existing message via manage messages?

Summary

Is it possible to change the message type of existing message via manage messages?

Content

Hi team -

New year wishes to all.

Is it possible to change the Message Type of an existing message ? ex : We are trying to change the message type of a current termination related message (PER_EMTRM_MGR_REPORTEE_EXISTS ) from 'Message' to 'Error'. But we observe that we are able to edit the message & change the type, but it does not reflect during the transaction. Is it possible to change or are they delivered messages that cannot be modified?

Kavitha