diff --git a/web/app/components/workflow/hooks/use-available-blocks.ts b/web/app/components/workflow/hooks/use-available-blocks.ts
index b4e037d29f..e1a1919afd 100644
--- a/web/app/components/workflow/hooks/use-available-blocks.ts
+++ b/web/app/components/workflow/hooks/use-available-blocks.ts
@@ -21,7 +21,9 @@ export const useAvailableBlocks = (nodeType?: BlockEnum, inContainer?: boolean)
   } = useNodesMetaData()
   const availableNodesType = useMemo(() => availableNodes.map(node => node.metaData.type), [availableNodes])
   const availablePrevBlocks = useMemo(() => {
-    if (!nodeType || nodeType === BlockEnum.Start || nodeType === BlockEnum.DataSource)
+    if (!nodeType || nodeType === BlockEnum.Start || nodeType === BlockEnum.DataSource
+      || nodeType === BlockEnum.TriggerPlugin || nodeType === BlockEnum.TriggerWebhook
+      || nodeType === BlockEnum.TriggerSchedule)
       return []
 
     return availableNodesType