diff --git a/autogpt_platform/backend/backend/api/features/store/model.py b/autogpt_platform/backend/backend/api/features/store/model.py
index b6502cb673..814ca6ad65 100644
--- a/autogpt_platform/backend/backend/api/features/store/model.py
+++ b/autogpt_platform/backend/backend/api/features/store/model.py
@@ -38,7 +38,7 @@ class StoreAgent(pydantic.BaseModel):
     description: str
     runs: int
     rating: float
-    agent_graph_id: str | None = None
+    agent_graph_id: str = ""
 
 
 class StoreAgentsResponse(pydantic.BaseModel):