Lag exporter failing on retrieval of offsets after topic was deleted and recreated with fewer partitions.

[manusuku]

Describe the bug
the lag exporter ( now upgraded to seglo/kafka-lag-exporter:0.8.2 ) fails to get offsets after we deleted certain topics and recreated with fewer partitions. (NOTE: the lag exporter was working before this change)

Seems to give below DEBUG messages for partitions which are not existing any more:
DEBUG o.a.k.c.consumer.internals.Fetcher - [Consumer clientId=consumer-kafkalagexporter-39, groupId=kafkalagexporter] Leader for partition partition-72 is unknown for fetching offset -2

finally gets ERROR as below
023-07-28 05:38:17,027 ERROR c.l.k.ConsumerGroupCollector$ akka://kafka-lag-exporter/user/consumer-group-collector-kafka - Supervisor RestartSupervisor saw failure [1]: A failure occurred while retrieving offsets. Shutting down. java.lang.Exception: A failure occurred while retrieving offsets. Shutting down.

To Reproduce

Deleted an existing topic, recreated same topic with lesser partitions. Above DEBUG messages.

Environment

• Version seglo/kafka-lag-exporter:0.8.2
• Version of Apache Kafka cluster kafka_2.13-3.1.0
• Run with Helm or Standalone stand alone (docker image)

Additional context
Add any other context about the problem here.