diff --git a/ifrs17/Utils/Queries.ipynb b/ifrs17/Utils/Queries.ipynb
index ec0643a4..979ad478 100644
--- a/ifrs17/Utils/Queries.ipynb
+++ b/ifrs17/Utils/Queries.ipynb
@@ -122,7 +122,7 @@
                 "\n{",
                 "\n    return (await querySource.LoadParameterAsync<T>(args.Year, args.Month, filterExpression))",
                 "\n                             .Where(x => x.Scenario == args.Scenario || x.Scenario == null)",
-                "\n                             .GroupBy(x => identityExpression)",
+                "\n                             .GroupBy(identityExpression)",
                 "\n                             .Select(x => x.OrderByDescending(y => y.Year)",
                 "\n                                           .ThenByDescending(y => y.Month)",
                 "\n                                           .ThenByDescending(y => y.Scenario)",