In one string of the supported versions list there were a few discrepancies, This update should make no difference to current v1.21.7.
*One side note you may see an error in your server console if running 1.21.7 saying its not compatible and disabling it's self, Disregard that error its a false message I'm working on fixing it in next update or two*

If you wish to make a difference and help promote / encourage the development of this plugin feel free to donate to my PayPal https://www.paypal.com/paypalme/TriCityMc?country.x=US&locale.x=en_US

All proceeds go to Server & Plugin development.
Happy Gaming!!!