Debezium Kafka Connect for Postgresql receiving unexpected update message received

I am using debezium kafka connect to stream postgresql database CDC events to kafka cluster. Currently, I am on version 1.9.0 but want to upgrade to version 2.4.0

We are using Kafka outbox pattern to stream database records to Kafka queues.

I am able to upgrade to 2.4.0 but getting a strange warning

 Unexpected update message received Struct{id=1} and ignored   [io.debezium.transforms.outbox.EventRouterDelegate]

Below is my configuration

{"value.converter.delegate.converter.type.schemas.enable": "false","database.password": "*****","database.user": "postgres","publication.name": "dbz_outbox_pub","slot.name": "debezium2","topic.creation.default.cleanup.policy": "compact","heartbeat.topic.prefix": "__debezium-heartbeat","tasks.max": "1","transforms": "outbox","topic.creation.default.partitions": "1","heartbeat.interval.ms": "60000","key.converter": "org.apache.kafka.connect.storage.StringConverter","connector.class": "io.debezium.connector.postgresql.PostgresConnector","transforms.outbox.table.field.event.key": "aggregateid","publication.autocreate.mode": "filtered","topic.creation.default.replication.factor": "1","heartbeat.action.query": "CREATE TABLE IF NOT EXISTS debezium_heartbeat (id SERIAL PRIMARY KEY, ts TIMESTAMP WITH TIME ZONE);\nINSERT INTO debezium_heartbeat (id, ts) VALUES (1, NOW()) ON CONFLICT(id) DO UPDATE SET ts=EXCLUDED.ts;","plugin.name": "pgoutput","transforms.outbox.type": "io.debezium.transforms.outbox.EventRouter","table.include.list": "public.kafkaoutbox,public.debezium_heartbeat","topic.creation.default.compression.type": "uncompressed","value.converter": "org.apache.kafka.connect.storage.StringConverter","database.dbname": "superipdev_cellb","value.converter.delegate.converter.type": "org.apache.kafka.connect.json.JsonConverter","database.port": "5432","transforms.outbox.table.field.event.payload": "payload","transforms.outbox.route.topic.replacement": "${routedByValue}","tombstones.on.delete": "false","key.converter.delegate.converter.type.schemas.enable": "false","event.processing.failure.handling.mode": "warn","schema.include.list": "","snapshot.mode": "never","database.hostname": "host.docker.internal","topic.prefix": "cell_b","database.server.name": "cell_b","name": "debezium2"}

has anyone come across this before? Any help would be highly appreciated.