diff --git a/src/main/python/ddadevops/infrastructure/release_mixin/repo.py b/src/main/python/ddadevops/infrastructure/release_mixin/repo.py
index efbc0f6..4ab3ae5 100644
--- a/src/main/python/ddadevops/infrastructure/release_mixin/repo.py
+++ b/src/main/python/ddadevops/infrastructure/release_mixin/repo.py
@@ -125,6 +125,6 @@ class ReleaseContextRepository:
             self.main_branch,
         )
         if not result.is_valid():
-            issues = '\n'.join.result.validate()
+            issues = '\n'.join(result.validate())
             raise ValueError(f"invalid release: {issues}")
         return result