Prevent primary allocation from being an additional allocation at the same time when creating a server

public/themes/pterodactyl/js/admin/new-server.js

@@ -21,18 +21,23 @@ $(document).ready(function() {
     $('#pNestId').select2({
         placeholder: 'Select a Nest',
     }).change();
+
     $('#pEggId').select2({
         placeholder: 'Select a Nest Egg',
     });
+
     $('#pPackId').select2({
         placeholder: 'Select a Service Pack',
     });
+
     $('#pNodeId').select2({
         placeholder: 'Select a Node',
     }).change();
+
     $('#pAllocation').select2({
         placeholder: 'Select a Default Allocation',
     });
+
     $('#pAllocationAdditional').select2({
         placeholder: 'Select Additional Allocations',
     });
@@ -97,10 +102,8 @@ $('#pNodeId').on('change', function () {
                 data: v.allocations,
                 placeholder: 'Select a Default Allocation',
             });
-            $('#pAllocationAdditional').html('').select2({
+
-                data: v.allocations,
+            updateAdditionalAllocations();
-                placeholder: 'Select Additional Allocations',
-            })
         }
     });
 });
@@ -154,3 +157,31 @@ $('#pEggId').on('change', function (event) {
         $('#appendVariablesTo').append(dataAppend);
     });
 });
+
+$('#pAllocation').on('change', function () {
+    updateAdditionalAllocations();
+});
+
+function updateAdditionalAllocations() {
+    let currentAllocation = $('#pAllocation').val();
+    let currentNode = $('#pNodeId').val();
+
+    $.each(Pterodactyl.nodeData, function (i, v) {
+        if (v.id == currentNode) {
+            let allocations = [];
+
+            for (let i = 0; i < v.allocations.length; i++) {
+                const allocation = v.allocations[i];
+
+                if (allocation.id != currentAllocation) {
+                    allocations.push(allocation);
+                }
+            }
+
+            $('#pAllocationAdditional').html('').select2({
+                data: allocations,
+                placeholder: 'Select Additional Allocations',
+            });
+        }
+    });
+}