diff --git a/swh/journal/replay.py b/swh/journal/replay.py
--- a/swh/journal/replay.py
+++ b/swh/journal/replay.py
@@ -81,7 +81,8 @@
         if not _check_revision_date(rev):
             logging.warning('Excluding revision (invalid date): %r', rev)
             continue
-        good_revisions.append(rev)
+        if rev not in good_revisions:
+            good_revisions.append(rev)
     return good_revisions