[arch-general] aur/solr: Unknown PGP key

Hello, when trying to install the solr package from aur, installation fails because of an unknown PGP key ("051A0FAF76BC6507", according to comment should be "Adrien Grand (CODE SIGNING KEY) "). Was this key removed from database for any reason, or did it just change? Or does the package have security issues, and I shouldn't install it? Kind regards Peter