mySQL Group Replication Error “ERROR 3092 (HY000)”

The full error (on 2nd node) is:

mysql> START GROUP_REPLICATION;  ERROR 3092 (HY000): The server is not configured properly to be an active member of the group. Please see more details on error log. 

This is after starting the 1st server without error. The log shows:

2021-02-27T19:05:45.079426Z 16 [System] [MY-010597] [Repl] 'CHANGE MASTER TO FOR CHANNEL 'group_replication_recovery' executed'. Previous state master_host='', master_port= 3306, master_log_file='', master_log_pos= 4, master_bind=''. New state master_host='', master_port= 3306, master_log_file='', master_log_pos= 4, master_bind=''. 2021-02-27T19:06:10.874606Z 16 [System] [MY-013587] [Repl] Plugin group_replication reported: 'Plugin 'group_replication' is starting.' 2021-02-27T19:06:10.875454Z 17 [System] [MY-011565] [Repl] Plugin group_replication reported: 'Setting super_read_only=ON.' 2021-02-27T19:06:10.878134Z 16 [Warning] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Automatically adding IPv4 localhost address to the allowlist. It is mandatory that it is added.' 2021-02-27T19:06:10.878182Z 16 [Warning] [MY-011735] [Repl] Plugin group_replication reported: '[GCS] Automatically adding IPv6 localhost address to the allowlist. It is mandatory that it is added.' 2021-02-27T19:06:10.881114Z 18 [System] [MY-010597] [Repl] 'CHANGE MASTER TO FOR CHANNEL 'group_replication_applier' executed'. Previous state master_host='<NULL>', master_port= 0, master_log_file='', master_log_pos= 4, master_bind=''. New state master_host='<NULL>', master_port= 0, master_log_file='', master_log_pos= 4, master_bind=''. 2021-02-27T19:06:13.300659Z 0 [ERROR] [MY-011516] [Repl] Plugin group_replication reported: 'There is already a member with server_uuid 6227f63c-dd97-11ea-8989-86fbcb300464. The member will now exit the group.' 

I am following the instructions here: https://www.digitalocean.com/community/tutorials/how-to-configure-mysql-group-replication-on-ubuntu-16-04

The instructions say that the UUID should be the same for all servers.

My droplet is a LAMP Ubuntu 20.04 droplet. mySQL 8.0.23

Anyone run into this? Any thoughts on what’s going wrong? I’ve checked and double-checked the procedure and made sure I followed it as best I could.