diff --git a/ingestion/src/metadata/ingestion/source/database/bigquery.py b/ingestion/src/metadata/ingestion/source/database/bigquery.py
index bc9f1e68af2..c73abd38f8e 100644
--- a/ingestion/src/metadata/ingestion/source/database/bigquery.py
+++ b/ingestion/src/metadata/ingestion/source/database/bigquery.py
@@ -143,6 +143,8 @@ class BigquerySource(CommonDbSourceService):
         """
         try:
             list_project_ids = [self.project_id]
+            if not self.service_connection.taxonomyProjectID:
+                self.service_connection.taxonomyProjectID = []
             list_project_ids.extend(self.service_connection.taxonomyProjectID)
             for project_ids in list_project_ids:
                 taxonomies = PolicyTagManagerClient().list_taxonomies(
diff --git a/openmetadata-spec/src/main/resources/json/schema/entity/services/connections/database/bigQueryConnection.json b/openmetadata-spec/src/main/resources/json/schema/entity/services/connections/database/bigQueryConnection.json
index ca542906d64..4ec9c242033 100644
--- a/openmetadata-spec/src/main/resources/json/schema/entity/services/connections/database/bigQueryConnection.json
+++ b/openmetadata-spec/src/main/resources/json/schema/entity/services/connections/database/bigQueryConnection.json
@@ -78,7 +78,6 @@
       "items": {
         "type": "string"
       },
-      "uniqueItems": true,
       "default": null
     },
     "taxonomyLocation": {