diff --git a/pybtc/connector.py b/pybtc/connector.py
index d28526b..f6a0d21 100644
--- a/pybtc/connector.py
+++ b/pybtc/connector.py
@@ -771,6 +771,9 @@ class UTXO():
                         c -= 1
                         continue
                     break
+                # if not lb:
+                #     await asyncio.sleep(0)
+                #     return
 
                 r = set()
                 db = set()
@@ -785,9 +788,8 @@ class UTXO():
                         await conn.execute("DELETE FROM connector_utxo WHERE "
                                            "outpoint = ANY($1);", r)
                         await conn.copy_records_to_table('connector_utxo',  columns=["outpoint", "data"], records=rs)
-                        if lb:
-                            await conn.execute("UPDATE connector_utxo_state SET value = $1 "
-                                               "WHERE name = 'last_block';", lb)
+                        await conn.execute("UPDATE connector_utxo_state SET value = $1 "
+                                           "WHERE name = 'last_block';", lb)
                         await conn.execute("UPDATE connector_utxo_state SET value = $1 "
                                            "WHERE name = 'last_cached_block';", block_height)
                 self.saved_utxo += len(rs)