Troubleshooting Tip: FortiSIEM v7.5.0 upgrade failure due to package conflict

Description

This article describes the issue when the upgrade to v7.5.0 may fail due to conflicting mono/xamarin packages and dependency issues during OS upgrade such as the following error observed below:

The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.

Error: Transaction test error:
file /usr/lib64/libmonoboehm-2.0.so.1.0.0 from install of mono-core-6.12.0-5.el9.x86_64 conflicts with file from package libmonoboehm-2_0-1-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib64/libmonosgen-2.0.so.1.0.0 from install of mono-core-6.12.0-5.el9.x86_64 conflicts with file from package libmonosgen-2_0-1-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib/mono/gac/System.Data.Services.Client/4.0.0.0__b77a5c561934e089/System.Data.Services.Client.dll from install of mono-data-6.12.0-5.el9.x86_64 conflicts with file from package mono-winfxcore-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib64/pkgconfig/monosgen-2.pc from install of mono-devel-6.12.0-5.el9.x86_64 conflicts with file from package libmonosgen-2_0-devel-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib64/pkgconfig/mono-2.pc from install of mono-devel-6.12.0-5.el9.x86_64 conflicts with file from package libmono-2_0-devel-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/share/mono-2.0/mono/eglib/eglib-config.h from install of mono-devel-6.12.0-5.el9.x86_64 conflicts with file from package libmono-2_0-devel-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib/mono/4.5/mod.exe from install of mono-devel-6.12.0-5.el9.x86_64 conflicts with file from package monodoc-core-6.12.0.107-0.xamarin.9.epel8.x86_64
file /usr/lib/mono/gac/System.Data.Services.Client/4.0.0.0__b77a5c561934e089/System.Data.Services.Client.dll from install of mono-winfx-6.12.0-5.el9.x86_64 conflicts with file from package mono-winfxcore-6.12.0.107-0.xamarin.9.epel8.x86_64

Scope

FortiSIEM.

Solution

1. Revert to the last working snapshot.

2. Run system update.

# dnf update -y

3. Remove conflicting mono packages.

# rpm -e --nodeps mono-core

# rpm -e --nodeps mono-devel

# rpm -qa | grep -i mono

# dnf remove mono\*

4. Clean package cache.

# dnf clean packages

# dnf clean all

5. Disable FIPS.

# /usr/bin/fips-mode-setup --disable

# reboot

6. Perform the upgrade once again to v7.5.0.