Here is a consumer group with offsets of 100 and group ID is group-0.

I use kafka-consumer-groups to delete that consumer group.

kafka-consumer-groups --bootstrap-server 
 --delete --group group-0 --execute

and it returned success

Deletion of requested consumer group ('group-0') was successful.

Then I recreated the group with the same id group-0.

Why does the new group still hold offset 100? Why is it not 0?