diff --git a/src/sentry/models/artifactbundle.py b/src/sentry/models/artifactbundle.py
index d71207c51978..30b847ed6509 100644
--- a/src/sentry/models/artifactbundle.py
+++ b/src/sentry/models/artifactbundle.py
@@ -253,8 +253,8 @@ def normalize_headers(headers: dict) -> dict:
         return {k.lower(): v for k, v in headers.items()}
 
     @staticmethod
-    def normalize_debug_id(debug_id: str | None) -> str | None:
-        if debug_id is None:
+    def normalize_debug_id(debug_id: object) -> str | None:
+        if not isinstance(debug_id, str):
             return None
 
         try:
diff --git a/tests/sentry/debug_files/test_artifact_bundles.py b/tests/sentry/debug_files/test_artifact_bundles.py
index 1b2fc59d404b..f8dcc24f9cc7 100644
--- a/tests/sentry/debug_files/test_artifact_bundles.py
+++ b/tests/sentry/debug_files/test_artifact_bundles.py
@@ -102,6 +102,15 @@ def get_indexed_files(project, release_name="", dist_name="", distinct=False):
     return list(query)
 
 
+def test_normalize_debug_id_rejects_non_strings() -> None:
+    assert ArtifactBundleArchive.normalize_debug_id(None) is None
+    assert ArtifactBundleArchive.normalize_debug_id(123) is None
+    assert (
+        ArtifactBundleArchive.normalize_debug_id("aaaaaaaa-0000-0000-0000-000000000000")
+        == "aaaaaaaa-0000-0000-0000-000000000000"
+    )
+
+
 class ArtifactLookupTest(TestCase):
     def clear_cache(self):
         redis_client = get_redis_cluster_for_artifact_bundles()