Sysbench - Public key for postgresql-libs-9.2.24-7.el7_9.x86_64.rpm is not installed

I have a mariadb on a redhat server (7.9) and trying to install sysbench for benchmarking with this command: sudo yum -y install sysbench I got this error: Loaded plugins: fusioninventory-agent, product-id, rhnplugin, search-disabled-repos This system is receiving updates from RHN Classic or Red Hat Satellite. Resolving Dependencies --> Running transaction check ---> Package sysbench.x86_64 0:1.0.17-2.el7 will be installed --> Processing Dependency: libck.so.0()(64bit) for package: sysbench-1.0.17-2.el7.x86_64 --> Processing Dependency: libluajit-5.1.so.2()(64bit) for package: sysbench-1.0.17-2.el7.x86_64 --> Processing Dependency: libpq.so.5()(64bit) for package: sysbench-1.0.17-2.el7.x86_64 --> Running transaction check ---> Package ck.x86_64 0:0.5.2-2.el7 will be installed ---> Package luajit.x86_64 0:2.0.4-3.el7 will be installed ---> Package postgresql-libs.x86_64 0:9.2.24-7.el7_9 will be installed --> Finished Dependency Resolution Dependencies Resolved ===================================================================================================================================================================================================== Package Arch Version Repository Size ===================================================================================================================================================================================================== Installing: sysbench x86_64 1.0.17-2.el7 rhel-x86_64-7-epel-20220531 152 k Installing for dependencies: ck x86_64 0.5.2-2.el7 rhel-x86_64-7-epel-20220531 26 k luajit x86_64 2.0.4-3.el7 rhel-x86_64-7-epel-20220531 343 k postgresql-libs x86_64 9.2.24-7.el7_9 rhel-x86_64-7-updates-20220531 235 k Transaction Summary ===================================================================================================================================================================================================== Install 1 Package (+3 Dependent packages) Total size: 756 k Installed size: 2.3 M Downloading packages: warning: /var/cache/yum/x86_64/7Server/rhel-x86_64-7-updates-20220531/packages/postgresql-libs-9.2.24-7.el7_9.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY Public key for postgresql-libs-9.2.24-7.el7_9.x86_64.rpm is not installed And I don't unterstand why it can't find the key.