diff --git a/freqtrade/persistence/trade_model.py b/freqtrade/persistence/trade_model.py
index 66b0b2ddb..3317d0ceb 100644
--- a/freqtrade/persistence/trade_model.py
+++ b/freqtrade/persistence/trade_model.py
@@ -1128,9 +1128,9 @@ class Trade(_DECL_BASE, LocalTrade):
     timeframe = Column(Integer, nullable=True)
 
     trading_mode = Column(Enum(TradingMode), nullable=True)
-    amount_precision = Column(Float)
-    price_precision = Column(Float)
-    precision_mode = Column(Integer)
+    amount_precision = Column(Float, nullable=True)
+    price_precision = Column(Float, nullable=True)
+    precision_mode = Column(Integer, nullable=True)
 
     # Leverage trading properties
     leverage = Column(Float, nullable=True, default=1.0)
diff --git a/tests/test_persistence.py b/tests/test_persistence.py
index 8a3a18577..f68791b72 100644
--- a/tests/test_persistence.py
+++ b/tests/test_persistence.py
@@ -1387,7 +1387,7 @@ def test_migrate_new(mocker, default_conf, fee, caplog):
     assert log_has("trying trades_bak2", caplog)
     assert log_has("Running database migration for trades - backup: trades_bak2, orders_bak0",
                    caplog)
-    assert round(trade.open_trade_value, 15) == trade._calc_open_trade_value(
+    assert pytest.approx(trade.open_trade_value) == trade._calc_open_trade_value(
         trade.amount, trade.open_rate)
     assert trade.close_profit_abs is None