diff --git a/web/app/components/workflow/nodes/assigner/default.ts b/web/app/components/workflow/nodes/assigner/default.ts
index f443ae1d3b..6341305576 100644
--- a/web/app/components/workflow/nodes/assigner/default.ts
+++ b/web/app/components/workflow/nodes/assigner/default.ts
@@ -29,7 +29,7 @@ const nodeDefault: NodeDefault<AssignerNodeType> = {
       if (!errorMessages && !value.variable_selector?.length)
         errorMessages = t(`${i18nPrefix}.fieldRequired`, { field: t('workflow.nodes.assigner.assignedVariable') })
 
-      if (!errorMessages && value.operation !== WriteMode.clear) {
+      if (!errorMessages && value.operation !== WriteMode.clear && value.operation !== WriteMode.removeFirst && value.operation !== WriteMode.removeLast) {
         if (value.operation === WriteMode.set || value.operation === WriteMode.increment
           || value.operation === WriteMode.decrement || value.operation === WriteMode.multiply
           || value.operation === WriteMode.divide) {