diff --git a/components/backlog/pbi-dialog.tsx b/components/backlog/pbi-dialog.tsx
index 8174f27..b93de29 100644
--- a/components/backlog/pbi-dialog.tsx
+++ b/components/backlog/pbi-dialog.tsx
@@ -79,9 +79,13 @@ export function PbiDialog({ state, onClose }: PbiDialogProps) {
     undefined
   )
 
-  const error = isEdit
-    ? (typeof updateState?.error === 'string' ? updateState.error : null)
-    : (typeof createState?.error === 'string' ? createState.error : null)
+  const activeState = isEdit ? updateState : createState
+  const error = typeof activeState?.error === 'string' ? activeState.error : null
+  const fieldError = (field: string) => {
+    const err = activeState?.error
+    if (!err || typeof err === 'string') return undefined
+    return (err as Record<string, string[]>)[field]?.[0]
+  }
 
   const titleRef = useRef<HTMLInputElement>(null)
   useEffect(() => {
@@ -111,8 +115,9 @@ export function PbiDialog({ state, onClose }: PbiDialogProps) {
                 defaultValue={pbi?.code ?? ''}
                 placeholder={isEdit ? '' : 'auto'}
                 maxLength={30}
-                className="font-mono text-sm"
+                className={fieldError('code') ? 'font-mono text-sm border-error' : 'font-mono text-sm'}
               />
+              {fieldError('code') && <p className="text-xs text-error">{fieldError('code')}</p>}
             </div>
             <div className="grid gap-1.5">
               <label htmlFor="pbi-title" className="text-sm font-medium">Titel</label>
@@ -124,7 +129,9 @@ export function PbiDialog({ state, onClose }: PbiDialogProps) {
                 placeholder="PBI-titel…"
                 required
                 maxLength={200}
+                className={fieldError('title') ? 'border-error' : ''}
               />
+              {fieldError('title') && <p className="text-xs text-error">{fieldError('title')}</p>}
             </div>
           </div>