actually it is supposed not to replace existing events but get first available ID during import. Looks like corrupted database or some other bug. Please keep an eye on event definitions and let us know if something similar happens again.

Best regards,
Victor

Thanks for explanation.
I found answer by myself, there is a user defined event with same ID (100000), after NetXMS upgrade it was replaced by LVM_PV_STATE_NOT_ACTIVE  :).
I need to move all user defined event IDs to number greater than 1000000.

Regards, Grzegorz.

                <event id="100010">
                        <name>LVM_PV_STATE_NOT_ACTIVE</name>
                        <guid>ca8e1035-16cc-4c1d-a530-5900d44ba52c</guid>
                        <code>100010</code>
                        <severity>3</severity>
                        <flags>1</flags>
                        <message>Physical volume %6 is in %4 state</message>
                        <description></description>
                </event>

Event is fired when LVM.PhysicalVolume.Status({instance}) is not equal "active" for five samples.

                                        <name>LVM.PhysicalVolume.Status({instance})</name>
                                        <description>LVM: status of physical volume {instance}</description>

All DCIs should be created automatically using instance discovery - check why instance name is empty.