diff --git a/centos2almaconverter/actions/common_checks.py b/centos2almaconverter/actions/common_checks.py
index e094010..e30241e 100644
--- a/centos2almaconverter/actions/common_checks.py
+++ b/centos2almaconverter/actions/common_checks.py
@@ -9,6 +9,9 @@
 from pleskdistup.common import action, dist, files, log, version
 
 
+# Todo. Action is not relevant now, because we checking the same thing of framework side
+# Additionaly platrofm module has no linux_distribution method in modern version of python
+# so we should migrate to our common.distro
 class AssertDistroIsCentos79(action.CheckAction):
     def __init__(self):
         self.name = "checking if distro is CentOS7"
@@ -30,7 +33,7 @@ def __init__(self):
         self.description = "You are running a distributive other than AlmaLinux 8. The finalization stage can only be started on AlmaLinux 8."
 
     def _do_check(self) -> bool:
-        return dist.get_distro() == dist.Distro.ALMALINUX8
+        return dist.get_distro() == dist.AlmaLinux("8")
 
 
 class AssertNoMoreThenOneKernelNamedNIC(action.CheckAction):
@@ -71,13 +74,13 @@ def _get_kernel_version_in_use(self) -> version.KernelVersion:
         return version.KernelVersion(curr_kernel)
 
     def _get_last_installed_kernel_version(self) -> version.KernelVersion:
-        versions = subprocess.check_output(["/usr/bin/rpm", "-q", "-a", "kernel"], universal_newlines=True).splitlines()
+        rpm_output = subprocess.check_output(["/usr/bin/rpm", "-q", "-a", "kernel"], universal_newlines=True).splitlines()
         # There is 'kernel-' prefix, that doesn't matter for us now, so just skip it
-        versions = [ver.split("-", 1)[-1] for ver in versions]
+        rpm_output = [ver.split("-", 1)[-1] for ver in rpm_output]
 
-        log.debug("Installed kernel versions: {}".format(', '.join(versions)))
+        log.debug("Installed kernel versions: {}".format(', '.join(rpm_output)))
 
-        versions = [version.KernelVersion(ver) for ver in versions]
+        versions = [version.KernelVersion(ver) for ver in rpm_output]
         return max(versions)
 
     def _is_realtime_installed(self) -> bool:
diff --git a/centos2almaconverter/actions/mariadb.py b/centos2almaconverter/actions/mariadb.py
index 03ade10..cc3d969 100644
--- a/centos2almaconverter/actions/mariadb.py
+++ b/centos2almaconverter/actions/mariadb.py
@@ -29,7 +29,7 @@ def _do_check(self) -> bool:
         for repofile in repofiles:
             for repo in rpm.extract_repodata(repofile):
                 repo_id, _, repo_baseurl, _, _, _ = repo
-                if ".mariadb.org" not in repo_baseurl:
+                if not repo_baseurl or ".mariadb.org" not in repo_baseurl:
                     continue
 
                 # Since repository will be deprecated for any distro at once it looks fine to check only for 7 on x86_64
@@ -148,7 +148,7 @@ def __init__(self):
         self.name = "install mysql connector"
 
     def _is_required(self) -> bool:
-        return mariadb.is_mysql_installed
+        return mariadb.is_mysql_installed()
 
     def _prepare_action(self) -> action.ActionResult:
         return action.ActionResult()
diff --git a/centos2almaconverter/actions/packages.py b/centos2almaconverter/actions/packages.py
index c3d5501..66356cf 100644
--- a/centos2almaconverter/actions/packages.py
+++ b/centos2almaconverter/actions/packages.py
@@ -119,7 +119,7 @@ def _is_required(self):
         return len(rpm.filter_installed_packages(self.conflict_pkgs_map.keys())) > 0
 
     def _prepare_action(self) -> action.ActionResult:
-        packages_to_remove = rpm.filter_installed_packages(self.conflict_pkgs_map.keys())
+        packages_to_remove = rpm.filter_installed_packages(list(self.conflict_pkgs_map.keys()))
 
         rpm.remove_packages(packages_to_remove)
 
@@ -230,7 +230,7 @@ def __init__(self):
     def _is_required(self) -> bool:
         for file in files.find_files_case_insensitive("/etc/yum.repos.d", ["plesk*migrator*.repo"]):
             for _1, _2, url, _3, _4, _5 in rpm.extract_repodata(file):
-                if "PMM_0.1.10/thirdparty-rpm" in url:
+                if url and "PMM_0.1.10/thirdparty-rpm" in url:
                     return True
 
         return False
@@ -240,7 +240,7 @@ def _prepare_action(self) -> action.ActionResult:
             files.backup_file(file)
 
             rpm.remove_repositories(file, [
-                lambda _1, _2, baseurl, _3: "PMM_0.1.10/thirdparty-rpm" in baseurl,
+                lambda _1, _2, baseurl, _3, _4: (baseurl is not None and "PMM_0.1.10/thirdparty-rpm" in baseurl),
             ])
         return action.ActionResult()