diff --git a/label_studio/io_storages/base_models.py b/label_studio/io_storages/base_models.py
index 5c6adc329325..e2528fd9679f 100644
--- a/label_studio/io_storages/base_models.py
+++ b/label_studio/io_storages/base_models.py
@@ -420,25 +420,27 @@ def _scan_and_create_links(self, link_class):
             # w/o Dataflow
             # pubsub.push(topic, key)
             # -> GF.pull(topic, key) + env -> add_task()
-            logger.debug(f'Scanning key {key}')
+            logger.debug('Scanning key %s', key)
             self.info_update_progress(last_sync_count=tasks_created, tasks_existed=tasks_existed)
 
             # skip if key has already been synced
             if n_tasks_linked := link_class.n_tasks_linked(key, self):
-                logger.debug(f'{self.__class__.__name__} already has {n_tasks_linked} tasks linked to {key=}')
+                logger.debug('%s link %s already exists with %d tasks linked', self.__class__.__name__, key, n_tasks_linked)
                 tasks_existed += n_tasks_linked  # update progress counter
                 continue
 
-            logger.debug(f'{self}: found new key {key}')
+            logger.debug('%s: found new key %s', self.__class__.__name__, key)
             try:
                 tasks_data = self.get_data(key)
             except (UnicodeDecodeError, json.decoder.JSONDecodeError) as exc:
                 logger.debug(exc, exc_info=True)
-                raise ValueError(
-                    f'Error loading JSON from file "{key}".\nIf you\'re trying to import non-JSON data '
-                    f'(images, audio, text, etc.), edit storage settings and enable '
-                    f'"Treat every bucket object as a source file"'
+                logger.warning(
+                    'Error loading JSON from file %s: %s. If you\'re trying to import non-JSON data '
+                    '(images, audio, text, etc.), edit storage settings and enable '
+                    '"Treat every bucket object as a source file"',
+                    key, exc
                 )
+                continue
 
             if isinstance(tasks_data, dict):
                 tasks_data = [tasks_data]