diff --git a/weblate/addons/base.py b/weblate/addons/base.py
index 0cd24fb954a9..0020b3808e1f 100644
--- a/weblate/addons/base.py
+++ b/weblate/addons/base.py
@@ -437,9 +437,10 @@ def post_update(
         self, component: Component, previous_head: str, skip_push: bool
     ) -> None:
         # Ignore file parse error, it will be properly tracked as an alert
-        with suppress(FileParseError):
-            self.update_translations(component, previous_head)
-        self.commit_and_push(component, skip_push=skip_push)
+        with component.repository.lock:
+            with suppress(FileParseError):
+                self.update_translations(component, previous_head)
+            self.commit_and_push(component, skip_push=skip_push)
 
 
 class StoreBaseAddon(BaseAddon):
diff --git a/weblate/trans/models/component.py b/weblate/trans/models/component.py
index cf009444f018..8be4a614012c 100644
--- a/weblate/trans/models/component.py
+++ b/weblate/trans/models/component.py
@@ -106,10 +106,12 @@
 from weblate.vcs.ssh import add_host_key
 
 if TYPE_CHECKING:
+    from collections.abc import Iterable
     from datetime import datetime
 
     from weblate.addons.models import Addon
     from weblate.auth.models import AuthenticatedHttpRequest, User
+    from weblate.checks.base import BaseCheck
     from weblate.trans.models import Unit
 
 NEW_LANG_CHOICES = (
@@ -3747,7 +3749,7 @@ def _schedule_sync_terminology(self) -> None:
             for glossary in self.project.glossaries:
                 sync_glossary_languages.delay(glossary.pk)
 
-    def get_unused_enforcements(self):
+    def get_unused_enforcements(self) -> Iterable[dict | BaseCheck]:
         from weblate.trans.models import Unit
 
         for current in self.enforced_checks:
@@ -3755,6 +3757,7 @@ def get_unused_enforcements(self):
                 check = CHECKS[current]
             except KeyError:
                 yield {"name": current, "notsupported": True}
+                continue
             # Check is always enabled
             if not check.default_disabled:
                 continue