diff --git a/engine/common/api_helpers/mixins.py b/engine/common/api_helpers/mixins.py
index 9b06f53725..4aacd63b33 100644
--- a/engine/common/api_helpers/mixins.py
+++ b/engine/common/api_helpers/mixins.py
@@ -249,7 +249,6 @@ def filter_lookups(child):
 GROUPING_ID = "grouping_id"
 SOURCE_LINK = "source_link"
 ROUTE = "route"
-ALERT_GROUP_LABELS = "alert_group_labels"
 ALERT_GROUP_MULTI_LABEL = "alert_group_multi_label"
 ALERT_GROUP_DYNAMIC_LABEL = "alert_group_dynamic_label"