Custom Rates 1.8.31 has been released.

• Implement support for the DVZ Stream plugin
  
• Fix warnings for missing (not loaded) language variables
  
• Fix group & forum selects
  
• Update default code for FontAwesome 6.7.2
  
• Update groups for MySQL 8 compatibility issues
  

In my installation (latest version, completely fresh) it's not possible for two different users to use the same reaction on the same post. To solve this, I had to remove the UNIQUE from the pidrid index:

ALTER TABLE mybb_ougc_customrep_log DROP INDEX pidrid;

In this way, a post can now receive more than one like.

You are correct, the logic to remove the index was added:
https://github.com/OUGC-Network/ougc-Cus...n.php#L300

But it wasn't removed from the default index list, so it was being generated anyway.
https://github.com/OUGC-Network/ougc-Cus...3c13771ae5

I will release a patched version in a few minutes because this seems rather important.

Regards.

Custom Rates 1.8.32 has been released.

• Removes piduid index from being created, which stopped multiple users from rating the same post using the same rate.