Ok. This was probably a bug in the update-manager that only manifested symptoms in my case in pcscd.
I noticed the only place 'hirsute' was mentioned was in /etc/apt/ is one file, /etc/apt/sources.list.d/system.sources there. Once I changed all instances of 'hirsute' to 'impish' in /etc/apt/sources.list.d/system.sources it was possible to get pcscd installed as normal.
So I guess this is either solved or should be relabeled as applying to 'update-manager'
Ok. This was probably a bug in the update-manager that only manifested symptoms in my case in pcscd.
I noticed the only place 'hirsute' was mentioned was in /etc/apt/ is one file, /etc/apt/ sources. list.d/ system. sources there. Once I changed all instances of 'hirsute' to 'impish' in /etc/apt/ sources. list.d/ system. sources it was possible to get pcscd installed as normal.
So I guess this is either solved or should be relabeled as applying to 'update-manager'