Remove device from cache in case null value cached in the distributed redis

dao/src/main/java/org/thingsboard/server/dao/device/DeviceServiceImpl.java

@@ -203,6 +203,8 @@ public class DeviceServiceImpl extends AbstractEntityService implements DeviceSe
         } catch (Exception t) {
             ConstraintViolationException e = extractConstraintViolationException(t).orElse(null);
             if (e != null && e.getConstraintName() != null && e.getConstraintName().equalsIgnoreCase("device_name_unq_key")) {
+                // remove device from cache in case null value cached in the distributed redis.
+                removeDeviceFromCache(device.getTenantId(), device.getName());
                 throw new DataValidationException("Device with such name already exists!");
             } else {
                 throw t;
@@ -281,13 +283,17 @@ public class DeviceServiceImpl extends AbstractEntityService implements DeviceSe
         }
         deleteEntityRelations(tenantId, deviceId);
 
+        removeDeviceFromCache(tenantId, device.getName());
+
+        deviceDao.removeById(tenantId, deviceId.getId());
+    }
+
+    private void removeDeviceFromCache(TenantId tenantId, String name) {
         List<Object> list = new ArrayList<>();
-        list.add(device.getTenantId());
-        list.add(device.getName());
+        list.add(tenantId);
+        list.add(name);
         Cache cache = cacheManager.getCache(DEVICE_CACHE);
         cache.evict(list);
-
-        deviceDao.removeById(tenantId, deviceId.getId());
     }
 
     @Override