java.lang.IllegalStateException: Values 'null' and '' are not comparable
	at org.ametys.runtime.model.disableconditions.AbstractRelativeDisableCondition.evaluateDisableConditionValue(AbstractRelativeDisableCondition.java:302)
	at org.ametys.runtime.model.disableconditions.AbstractRelativeDisableCondition.evaluate(AbstractRelativeDisableCondition.java:154)
	at org.ametys.runtime.model.disableconditions.DefaultDisableConditionsEvaluator.evaluateDisableConditions(DefaultDisableConditionsEvaluator.java:94)
	at org.ametys.runtime.model.disableconditions.DefaultDisableConditionsEvaluator.evaluateDisableConditions(DefaultDisableConditionsEvaluator.java:45)
	at org.ametys.cms.data.holder.impl.IndexableDataHolderHelper.renderValue(IndexableDataHolderHelper.java:643)
	at org.ametys.cms.data.holder.impl.IndexableDataHolderHelper.dataToSAX(IndexableDataHolderHelper.java:209)
	at org.ametys.cms.data.type.impl.CompositeRepositoryModelItemType._valueToSAX(CompositeRepositoryModelItemType.java:73)
	at org.ametys.cms.data.type.impl.CompositeRepositoryModelItemType.valueToSAX(CompositeRepositoryModelItemType.java:54)
	at org.ametys.cms.data.holder.impl.IndexableDataHolderHelper.dataToSAX(IndexableDataHolderHelper.java:237)
	at org.ametys.cms.data.holder.impl.DefaultModelAwareDataHolder.dataToSAX(DefaultModelAwareDataHolder.java:832)
	at org.ametys.plugins.repository.data.ametysobject.ModelAwareDataAwareAmetysObject.dataToSAX(ModelAwareDataAwareAmetysObject.java:156)
	at org.ametys.cms.content.ContentSaxer.saxAttributes(ContentSaxer.java:386)
	at org.ametys.cms.content.ContentSaxer.saxBody(ContentSaxer.java:181)
	at org.ametys.cms.content.ContentSaxer.saxContent(ContentSaxer.java:150)
	at org.ametys.cms.content.ContentGenerator._saxContent(ContentGenerator.java:126)
	at org.ametys.cms.content.ContentGenerator._generateContent(ContentGenerator.java:90)
	at org.ametys.cms.content.ContentGenerator.generate(ContentGenerator.java:74)
	at fr.aws.prodige.ContentGenerator.generate(ContentGenerator.java:46)