Upgrading my **Debian 'bullseye'** distribution does not work due to unmet dependencies.

```
Operating System: Debian GNU/Linux bullseye/sid
          Kernel: Linux 5.6.0-2-686-pae
    Architecture: x86

```

When I try to upgrade my system by using `apt update` followed by `apt upgrade`, I get:

```
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 gnustep-base-runtime : Depends: gnustep-base-common (= 1.27.0-3) but 1.26.0-7 is to be installed
 libgnustep-base1.27 : Depends: gnustep-base-common (= 1.27.0-3) but 1.26.0-7 is to be installed
E: Broken packages

```

Does anyone know how to solve this?