diff --git a/backend/app/api/v1/routes_clients.py b/backend/app/api/v1/routes_clients.py
index 225faca..fd28c3b 100644
--- a/backend/app/api/v1/routes_clients.py
+++ b/backend/app/api/v1/routes_clients.py
@@ -216,7 +216,7 @@ async def deactivate_client(
         resource_type="client",
         resource_id=client_id,
         resource_name=doc["name"],
-        details={},
+        details={"was_active": doc.get("is_active", True)},
     )
 
 
diff --git a/backend/app/services/audit_logger.py b/backend/app/services/audit_logger.py
index 1ca34c6..fee7071 100644
--- a/backend/app/services/audit_logger.py
+++ b/backend/app/services/audit_logger.py
@@ -94,11 +94,15 @@ class AuditLogger:
             api_version="v1"
         )
 
-        # Save to database
+        # Save to database — non-raising so audit failure never aborts the primary operation
         collection = await self._get_collection()
-        result = await collection.insert_one(audit_log.dict(by_alias=True))
-
-        return str(result.inserted_id)
+        try:
+            result = await collection.insert_one(audit_log.dict(by_alias=True))
+            return str(result.inserted_id)
+        except Exception as exc:  # noqa: BLE001
+            import logging
+            logging.getLogger(__name__).error("audit log insert failed: %s", exc)
+            return ""
 
     @trace_async_operation("audit_logger.query_logs")
     async def query_logs(self, query: AuditLogQuery) -> AuditLogResponse: