Hii All Upon restarting our flink pipeline, we have suddenly started facing this weird error.

com.esotericsoftware.kryo.KryoException: Unable to find class: O_STATE
Serialization trace:
customerRecord (com.navi.ndp.pipelines.customerfunnel.models.CustomerMasterState)
	at com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:138)
	at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:115)
	at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:641)
	at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:99)

NO_STATE

is the default value of one enum field in the case class. Has anyone faced such issue ever ?