Problem with storing delta in audit

com.evolveum.midpoint.util.exception.SystemException: Problem during audit delta conversion
	at com.evolveum.midpoint.repo.sql.SqlAuditServiceImpl.convertDelta(SqlAuditServiceImpl.java:262)
	at com.evolveum.midpoint.repo.sql.SqlAuditServiceImpl.insertAuditDeltas(SqlAuditServiceImpl.java:202)
	at com.evolveum.midpoint.repo.sql.SqlAuditServiceImpl.auditAttempt(SqlAuditServiceImpl.java:153)
	at com.evolveum.midpoint.repo.sql.SqlAuditServiceImpl.audit(SqlAuditServiceImpl.java:136)
	at com.evolveum.midpoint.init.AuditServiceProxy.audit(AuditServiceProxy.java:85)
	at com.evolveum.midpoint.model.impl.util.AuditHelper.audit(AuditHelper.java:75)
	at com.evolveum.midpoint.model.impl.lens.ClockworkAuditHelper.auditEvent(ClockworkAuditHelper.java:205)
	at com.evolveum.midpoint.model.impl.lens.ClockworkAuditHelper.audit(ClockworkAuditHelper.java:79)
	at com.evolveum.midpoint.model.impl.lens.Clockwork.click(Clockwork.java:421)
	at com.evolveum.midpoint.model.impl.lens.Clockwork.run(Clockwork.java:161)
	at com.evolveum.midpoint.model.impl.controller.ModelController.executeChangesNonRaw(ModelController.java:429)
	at com.evolveum.midpoint.model.impl.controller.ModelController.executeChanges(ModelController.java:396)
	at com.evolveum.midpoint.web.component.progress.ProgressPanel$14.callWithContextPrepared(ProgressPanel.java:665)
	at com.evolveum.midpoint.web.component.progress.ProgressPanel$14.callWithContextPrepared(ProgressPanel.java:651)
	at com.evolveum.midpoint.web.component.SecurityContextAwareCallable.call(SecurityContextAwareCallable.java:50)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.evolveum.midpoint.util.exception.SchemaException: Cannot marshall property value PPV(null): marshaller returned null while converting property description in ObjectDelta(UserType:4bd9311f-927c-47ba-aa20-2d40b424d3ad,MODIFY: PropertyDeltaImpl( / {.../common/common-3}description, DELETE))
	at com.evolveum.midpoint.schema.DeltaConvertor.toObjectDeltaType(DeltaConvertor.java:203)
	at com.evolveum.midpoint.schema.DeltaConvertor.toObjectDeltaTypeXml(DeltaConvertor.java:217)
	at com.evolveum.midpoint.repo.sql.SqlAuditServiceImpl.convertDelta(SqlAuditServiceImpl.java:229)
	... 18 more
Caused by: com.evolveum.midpoint.util.exception.SchemaException: Cannot marshall property value PPV(null): marshaller returned null while converting property description
	at com.evolveum.midpoint.schema.DeltaConvertor.toItemDeltaTypes(DeltaConvertor.java:371)
	at com.evolveum.midpoint.schema.DeltaConvertor.toObjectDeltaType(DeltaConvertor.java:201)
	... 20 more
Caused by: com.evolveum.midpoint.util.exception.SchemaException: Cannot marshall property value PPV(null): marshaller returned null
	at com.evolveum.midpoint.prism.impl.marshaller.PrismMarshaller.serializePropertyValue(PrismMarshaller.java:548)
	at com.evolveum.midpoint.prism.impl.marshaller.PrismMarshaller.marshalItemValue(PrismMarshaller.java:230)
	at com.evolveum.midpoint.prism.impl.marshaller.PrismMarshaller.marshalPrismValueAsRoot(PrismMarshaller.java:113)
	at com.evolveum.midpoint.prism.impl.marshaller.PrismSerializerImpl.serialize(PrismSerializerImpl.java:121)
	at com.evolveum.midpoint.schema.DeltaConvertor.toXNode(DeltaConvertor.java:411)
	at com.evolveum.midpoint.schema.DeltaConvertor.addModValues(DeltaConvertor.java:386)
	at com.evolveum.midpoint.schema.DeltaConvertor.toItemDeltaTypes(DeltaConvertor.java:369)
	... 21 more