diff --git a/changelogs/fragments/8831-fix-error-when-mapper-id-is-provided.yml b/changelogs/fragments/8831-fix-error-when-mapper-id-is-provided.yml
new file mode 100644
index 0000000000..63ac352057
--- /dev/null
+++ b/changelogs/fragments/8831-fix-error-when-mapper-id-is-provided.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - keycloak_user_federation - fix the ``UnboundLocalError`` that occurs when an ID is provided for a user federation mapper (https://github.com/ansible-collections/community.general/pull/8831).
\ No newline at end of file
diff --git a/plugins/modules/keycloak_user_federation.py b/plugins/modules/keycloak_user_federation.py
index f80d694e07..6034aa8b84 100644
--- a/plugins/modules/keycloak_user_federation.py
+++ b/plugins/modules/keycloak_user_federation.py
@@ -907,7 +907,7 @@ def main():
             if cid is None:
                 old_mapper = {}
             elif change.get('id') is not None:
-                old_mapper = next((before_mapper for before_mapper in before_mapper.get('mappers', []) if before_mapper["id"] == change['id']), None)
+                old_mapper = next((before_mapper for before_mapper in before_comp.get('mappers', []) if before_mapper["id"] == change['id']), None)
                 if old_mapper is None:
                     old_mapper = {}
             else: