[aur-general] brz pkgver() problem when updating on existing bzr repo

As I updated the PKGBUILD for he new autobump feature I observed the following problem on my https://aur.archlinux.org/packages/anamnesis-bzr package: When I run makepkg the first time, the bzr repo gets fetched, all ok. However running makepkg the second time gives the following error: ==> ERROR: /Common/Builds/aur/anamnesis-bzr/anamnesis is not a branch of bzr://anamnesis.bzr.sourceforge.net/bzrroot/anamnesis I don't know much about bzr, so I don't know what this error means. Can you help me please, is this a problem with the bzr url format, or a bug in makepkg or something else?