diff --git a/piker/data/feed.py b/piker/data/feed.py
index 6b841335..370745d7 100644
--- a/piker/data/feed.py
+++ b/piker/data/feed.py
@@ -413,6 +413,7 @@ async def start_backfill(
             ):
                 start_dt = min(starts)
                 print(f"SKIPPING DUPLICATE FRAME @ {next_start_dt}")
+                starts[start_dt] += 1
                 continue
 
             elif starts[next_start_dt] > 6: