diff --git a/Web/templates/main_admin.html b/Web/templates/main_admin.html
index 19f2f4f..3df2731 100755
--- a/Web/templates/main_admin.html
+++ b/Web/templates/main_admin.html
@@ -3418,14 +3418,24 @@ document.addEventListener('DOMContentLoaded', ()=>{
                                     `<form method="POST" action="{{ url_for('ausleihen', id='') }}${item._id}">
                                         ${isGroupedItem ? `
                                         <div class="grouped-borrow-controls" style="display:flex; gap:8px; flex-wrap:wrap; margin-bottom:8px; align-items:center;">
-                                            <label style="font-size:0.85rem; margin:0;">Anzahl:</label>
-                                            <input type="number" name="exemplare_count" min="1" max="${availableGroupedCount}" value="1" style="width:74px; padding:4px;">
-                                            <label style="font-size:0.85rem; margin:0;">oder Code:</label>
-                                            <select id="specific-item-card-${item._id}" name="specific_item_id" style="max-width:190px; padding:4px;">
-                                                <option value="">Automatisch wählen</option>
-                                                ${groupedAvailableUnits.map(unit => `<option value="${unit.id}">${unit.code}</option>`).join('')}
-                                            </select>
-                                        </div>` : ''}
+    <label style="font-size:0.85rem; margin:0;">Anzahl:</label>
+    <input type="number"
+           name="exemplare_count"
+           min="1"
+           max="${availableGroupedCount}"
+           value="1"
+           style="width:74px; padding:4px;"
+           oninput="if(this.value){ this.form.querySelector('[name=specific_item_id]').value = ''; }">
+
+    <label style="font-size:0.85rem; margin:0;">oder Code:</label>
+    <select id="specific-item-card-${item._id}"
+            name="specific_item_id"
+            style="max-width:190px; padding:4px;"
+            onchange="if(this.value !== ''){ this.form.querySelector('[name=exemplare_count]').value = '1'; }">
+        <option value="">Automatisch wählen</option>
+        ${groupedAvailableUnits.map(unit => `<option value="${unit.id}">${unit.code}</option>`).join('')}
+    </select>
+</div>` : ''}
                                         <button class="ausleihen" type="submit">Ausleihen</button>
                                     </form>` 
                                 : isBorrowedByMe ?