I'm currently stuck and cannot install mono-devel on my PC. I've installed the mono keyring and repo, but whenever I try to install it I get this:
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:
mono-devel : Depends: mono-runtime (>= 3.0~) but it is not going to be installed
Depends: libc6 (>= 2.31) but 2.28-10 is to be installed or
libc6.1 (>= 2.31) but it is not installable or
libc0.1 (>= 2.31) but it is not installable
Depends: libglib2.0-0 (>= 2.64.6) but 2.58.3-2+deb10u2 is to be installed
Depends: libmono-cecil-private-cil (>= 6.12.0.122) but it is not going to be installed
Depends: libmono-cecil-private-cil (< 6.12.0.123) but it is not going to be installed
Depends: libmono-codecontracts4.0-cil (>= 1.0) but it is not going to be installed
Depends: libmono-compilerservices-symbolwriter4.0-cil (>= 3.6.0) but it is not going to be installed
Depends: libmono-corlib4.5-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-peapi4.0a-cil (>= 3.2.8) but it is not going to be installed
Depends: libmono-relaxng4.0-cil (>= 2.10.1) but it is not going to be installed
Depends: libmono-security4.0-cil (>= 3.0.6) but it is not going to be installed
Depends: libmono-system-configuration-install4.0-cil (>= 1.0) but it is not going to be installed
Depends: libmono-system-configuration4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-core4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-data4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-drawing4.0-cil (>= 3.0.6) but it is not going to be installed
Depends: libmono-system-io-compression-filesystem4.0-cil (>= 3.2.1) but it is not going to be installed
Depends: libmono-system-runtime-serialization4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: libmono-system-runtime4.0-cil (>= 2.10.1) but it is not going to be installed
Depends: libmono-system-security4.0-cil (>= 1.0) but it is not going to be installed
Depends: libmono-system-servicemodel4.0a-cil (>= 3.2.3) but it is not going to be installed
Depends: libmono-system-web-services4.0-cil (>= 1.0) but it is not going to be installed
Depends: libmono-system-xml-linq4.0-cil (>= 3.0.6) but it is not going to be installed
Depends: libmono-system-xml4.0-cil (>= 3.12.0) but it is not going to be installed
Depends: libmono-system4.0-cil (>= 4.0.0~alpha1) but it is not going to be installed
Depends: mono-mcs (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: mono-roslyn (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: mono-gac (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: mono-xbuild (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: libmono-cil-dev (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: libmono-2.0-dev (>= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
Depends: libmono-2.0-dev (< 6.12.0.122-0xamarin1+ubuntu2004b1.1~) but it is not going to be installed
Depends: ca-certificates-mono (= 6.12.0.122-0xamarin1+ubuntu2004b1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Please help, thank you all.
