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-rw-r--r--rdiff-backup/rdiff_backup/user_group.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/rdiff-backup/rdiff_backup/user_group.py b/rdiff-backup/rdiff_backup/user_group.py
index 9209daf..a42b9a6 100644
--- a/rdiff-backup/rdiff_backup/user_group.py
+++ b/rdiff-backup/rdiff_backup/user_group.py
@@ -92,7 +92,7 @@ class Map:
try: return self.name2id_dict[name]
except KeyError:
out_id = self.find_id_from_name(name)
- self.name2id_dict[name] = out_id
+ if out_id is not None: self.name2id_dict[name] = out_id
return out_id
def get_id_from_id(self, id): return id