diff --git a/config.json.example b/config.json.example
index 87c27090e..e8473e919 100644
--- a/config.json.example
+++ b/config.json.example
@@ -36,7 +36,7 @@
     "experimental": {
         "use_sell_signal": false,
         "sell_profit_only": false,
-        "sell_fullfilled_at_roi": false
+        "ignore_roi_if_buy_signal": false
     },
     "telegram": {
         "enabled": true,
diff --git a/freqtrade/persistence.py b/freqtrade/persistence.py
index ad90d3f92..dfeb6145c 100644
--- a/freqtrade/persistence.py
+++ b/freqtrade/persistence.py
@@ -80,7 +80,7 @@ def check_migrate(engine) -> None:
     tabs = inspector.get_table_names()
     table_back_name = 'trades_bak'
     i = 0
-    while table_back_name in tabs:
+    for i, table_back_name in enumerate(tabs):
         i += 1
         table_back_name = f'trades_bak{i}'
         logger.info(f'trying {table_back_name}')