Cannot rejoin or add instance to MySQL InnoDB cluster
This has been fixed in MySQL Shell 8.0.23: https://dev.mysql.com/doc/relnotes/mysql-shell/8.0/en/news-8-0-23.html
An instance that belongs to an InnoDB Cluster is identified by its server UUID. If the UUID changed after the instance had left the cluster, for example because you used MySQL Enterprise Backup to restore from a backup, then the instance could not be rejoined to the cluster. Now, if the cluster encounters this situation, it checks the metadata to see if the instance can be identified using its host and port. If found, the metadata is updated based on the options used for the rejoin operation. This check is executed during the Cluster.rejoinInstance() and Cluster.rescan() operations.

Additionally, a check is executed to verify the serverId of all the instances is registered in the metadata as an instance attribute. If it is not, the metadata is updated accordingly. This check is executed on add, rejoin and rescan operations. (Bug #26649039)

Please upgrade MySQL Shell to 8.0.23.