diff --git a/backend/database.py b/backend/database.py
index ddaff86..e1f3405 100644
--- a/backend/database.py
+++ b/backend/database.py
@@ -443,7 +443,7 @@ def _migrate(conn_factory):
         ("users", "is_banned",    "INTEGER NOT NULL DEFAULT 0"),
         ("users", "ban_reason",   "TEXT"),
         # WebCal: Kalender-Abo-Token
-        ("users", "calendar_token", "TEXT UNIQUE"),
+        ("users", "calendar_token", "TEXT"),
     ]
     with conn_factory() as conn:
         for table, column, col_type in migrations: