Bug#987575: Acknowledgement (linux-kbuild-5.10: please add Breaks: sl-modem-dkms (<< 2.9.11~20110321-16.0))

[Andreas Beckmann]

Hi,

while you are at it, you could also add
  Breaks: dahdi-dkms (<< 1:2.11.1.0.20170917~dfsg-7.0)
since dahdi-dkms had a similar problem (#982334) which got fixed for 
bullseye.

Andreas