diff --git a/gallery_dl/extractor/bunkr.py b/gallery_dl/extractor/bunkr.py
index 25e9fd5f..8c1815e6 100644
--- a/gallery_dl/extractor/bunkr.py
+++ b/gallery_dl/extractor/bunkr.py
@@ -60,6 +60,7 @@ class BunkrAlbumExtractor(LolisafeAlbumExtractor):
     """Extractor for bunkr.si albums"""
     category = "bunkr"
     root = "https://bunkr.si"
+    archive_fmt = "{album_id}_{id|name}"
     pattern = BASE_PATTERN + r"/a/([^/?#]+)"
     example = "https://bunkr.si/a/ID"
 
diff --git a/test/results/bunkr.py b/test/results/bunkr.py
index bc8b3172..37fe9888 100644
--- a/test/results/bunkr.py
+++ b/test/results/bunkr.py
@@ -55,6 +55,16 @@ __tests__ = (
     "#count"   : 7,
 },
 
+{
+    "#url"     : "https://bunkr.cr/a/Gm931jJz",
+    "#comment" : "empty 'id', duplicate archive IDs (#6935)",
+    "#category": ("lolisafe", "bunkr", "album"),
+    "#class"   : bunkr.BunkrAlbumExtractor,
+    "#count"   : 2,
+
+    "id": "",
+},
+
 {
     "#url"     : "https://bunkr.ph/a/Lktg9Keq",
     "#class"   : bunkr.BunkrAlbumExtractor,