Error Message :
U00020343 Cannot change attribute 'EVENT_TIME' for object type 'EVNT'.
Our documentation shows that for
Database event objects you can set the attribute
EVENT_TIME using
GET_ATT or
:PUT_ATT, see references below.
However, using either GET_ATT or :PUT_ATT EVENT_TIME in a Database Event results in the above error message.
GET_ATT or :PUT_ATT EVENT_TIME does work in both File and Time Event.
Reference