diff --git a/gitea-to-ics.py b/gitea-to-ics.py
index 3046826..d2e1e86 100644
--- a/gitea-to-ics.py
+++ b/gitea-to-ics.py
@@ -29,11 +29,11 @@ def get_combined(token):
             issues = json.load(response)
             for issue in issues:
                 _id = issue['id']
-                if _id in combined:
-                    combined[_id]['categories'].append(q)
-                else:
+                if _id not in combined:
                     combined[_id] = issue
-                    combined[_id]['categories'] = [q]
+                    combined[_id]['categories'] = []
+                if q not in combined[_id]['categories']:
+                    combined[_id]['categories'].append(q)
         timestamp=datetime.datetime.now()
         print(f"{timestamp} Done processing {q}")
     return combined