He then also had to release Regensburg and had to reluctantly renounce Further Austria when Archduke Sigismund of Austria tried to make it over to Albert .
Regensburg had been reunited with Bavaria in 1486 .
He then also had to release Regensburg , which had been reunited with Bavaria in 1486 , and had to reluctantly renounce Further Austria when Archduke Sigismund of Austria tried to make it over to Albert .