+1. Overall looks good but I'd changed the error message a bit. It's got a Unicode — (—) rather than regular dash ("-"). Also the reference to plural "queries" should be singular and it could be any type of statement.

How about:

Prepared statements must be unique - '${this.name}' was used for a different statement

Thanks for taking a look — I've made that change

Nice I'll release a new semver patch w/ this change ASAP! Sorry for the delay.

excellent, thank you!

published pg@7.8.2 - thanks again for your help!