diff --git a/electrum/submarine_swaps.py b/electrum/submarine_swaps.py
index 47d2cbffe..316299023 100644
--- a/electrum/submarine_swaps.py
+++ b/electrum/submarine_swaps.py
@@ -1287,6 +1287,11 @@ class SwapManager(Logger):
         """Returns a list of swaps with unconfirmed funding tx (which require us to stay online)."""
         pending_swaps: List[SwapData] = []
         for swap in self.swaps.values():
+            if swap.is_redeemed:
+                # adb data might have been removed after is_redeemed was set.
+                # in that case lnwatcher will no longer fetch the spending tx
+                # and adb will return TX_HEIGHT_LOCAL
+                continue
             # note: adb.get_tx_height returns TX_HEIGHT_LOCAL if the txid is unknown
             funding_height = self.lnworker.wallet.adb.get_tx_height(swap.funding_txid).height
             spending_height = self.lnworker.wallet.adb.get_tx_height(swap.spending_txid).height