Problems to log on to openfire

Here’s my setup: OF3.4.1, mysql, IM1.2.0 - login takes a very long time (I only use transports on this server) - during wait time for login I can see the following error message in my logfile:

2007.11.15 10:31:27

org.jivesoftware.openfire.spi.PresenceManagerImpl.userUnavailable(PresenceManage rImpl.java:268)

Error storing offline presence of user: corona

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolation Exception: Duplicate entry ‘corona’ for key 1

any Idea what could be going wrong?