diff --git a/src/ahriman/core/status/client.py b/src/ahriman/core/status/client.py
index 943ccf31..c8a3398e 100644
--- a/src/ahriman/core/status/client.py
+++ b/src/ahriman/core/status/client.py
@@ -278,7 +278,7 @@ class Client:
         Args:
             package_base(str): package base to update
         """
-        return self.package_status_update(package_base, BuildStatusEnum.Building)
+        self.package_status_update(package_base, BuildStatusEnum.Building)
 
     def set_failed(self, package_base: str) -> None:
         """
@@ -287,7 +287,7 @@ class Client:
         Args:
             package_base(str): package base to update
         """
-        return self.package_status_update(package_base, BuildStatusEnum.Failed)
+        self.package_status_update(package_base, BuildStatusEnum.Failed)
 
     def set_pending(self, package_base: str) -> None:
         """
@@ -296,7 +296,7 @@ class Client:
         Args:
             package_base(str): package base to update
         """
-        return self.package_status_update(package_base, BuildStatusEnum.Pending)
+        self.package_status_update(package_base, BuildStatusEnum.Pending)
 
     def set_success(self, package: Package) -> None:
         """
@@ -305,16 +305,19 @@ class Client:
         Args:
             package(Package): current package properties
         """
-        return self.package_update(package, BuildStatusEnum.Success)
+        self.package_update(package, BuildStatusEnum.Success)
 
     def set_unknown(self, package: Package) -> None:
         """
-        set package status to unknown
+        set package status to unknown. Unlike other methods, this method also checks if package is known,
+        and - in case if it is - it silently skips updatd
 
         Args:
             package(Package): current package properties
         """
-        return self.package_update(package, BuildStatusEnum.Unknown)
+        if self.package_get(package.base):
+            return  # skip update in case if package is already known
+        self.package_update(package, BuildStatusEnum.Unknown)
 
     def status_get(self) -> InternalStatus:
         """
diff --git a/tests/ahriman/core/status/test_client.py b/tests/ahriman/core/status/test_client.py
index 8284f10e..51b151f3 100644
--- a/tests/ahriman/core/status/test_client.py
+++ b/tests/ahriman/core/status/test_client.py
@@ -240,20 +240,32 @@ def test_set_success(client: Client, package_ahriman: Package, mocker: MockerFix
     """
     must set success status to the package
     """
-    add_mock = mocker.patch("ahriman.core.status.Client.package_update")
+    update_mock = mocker.patch("ahriman.core.status.Client.package_update")
     client.set_success(package_ahriman)
 
-    add_mock.assert_called_once_with(package_ahriman, BuildStatusEnum.Success)
+    update_mock.assert_called_once_with(package_ahriman, BuildStatusEnum.Success)
 
 
 def test_set_unknown(client: Client, package_ahriman: Package, mocker: MockerFixture) -> None:
     """
     must add new package with unknown status
     """
-    add_mock = mocker.patch("ahriman.core.status.Client.package_update")
+    mocker.patch("ahriman.core.status.Client.package_get", return_value=[])
+    update_mock = mocker.patch("ahriman.core.status.Client.package_update")
     client.set_unknown(package_ahriman)
 
-    add_mock.assert_called_once_with(package_ahriman, BuildStatusEnum.Unknown)
+    update_mock.assert_called_once_with(package_ahriman, BuildStatusEnum.Unknown)
+
+
+def test_set_unknown_skip(client: Client, package_ahriman: Package, mocker: MockerFixture) -> None:
+    """
+    must skip unknown status update in case if pacakge is already known
+    """
+    mocker.patch("ahriman.core.status.Client.package_get", return_value=[(package_ahriman, None)])
+    update_mock = mocker.patch("ahriman.core.status.Client.package_update")
+    client.set_unknown(package_ahriman)
+
+    update_mock.assert_not_called()
 
 
 def test_status_get(client: Client) -> None: