--- a/libervia/backend/memory/migration/versions/fe3a02cb4bec_convert_legacypickle_columns_to_json.py	Tue Jun 18 12:06:45 2024 +0200
+++ b/libervia/backend/memory/migration/versions/fe3a02cb4bec_convert_legacypickle_columns_to_json.py	Wed Jun 19 18:44:57 2024 +0200
@@ -5,10 +5,12 @@
 Create Date: 2024-02-22 14:55:59.993983
 
 """
+
 from alembic import op
 import sqlalchemy as sa
 import pickle
 import json
+
 try:
     from libervia.backend.plugins.plugin_xep_0373 import PublicKeyMetadata
 except Exception:
@@ -76,10 +78,10 @@
                     "Warning: Failed to convert Trust Management cache with value "
                     f" {deserialized!r}, using empty array instead: {e}"
                 )
-                deserialized=[]
+                deserialized = []
 
         ret = json.dumps(deserialized, ensure_ascii=False, default=str)
-        if table == 'history' and ret == "{}":
+        if table == "history" and ret == "{}":
             # For history, we can remove empty data, but for other tables it may be
             # significant.
             ret = None