diff --git a/packages/nc-gui/components/nc/form-builder/index.vue b/packages/nc-gui/components/nc/form-builder/index.vue
index cc19278a3e..880f7bb09b 100644
--- a/packages/nc-gui/components/nc/form-builder/index.vue
+++ b/packages/nc-gui/components/nc/form-builder/index.vue
@@ -474,6 +474,7 @@ watch(
                     <NcFormBuilderInputSelectBase
                       :value="deepReference(field.model)"
                       :disabled="disabled"
+                      :filter-option="field.filterOption"
                       @update:value="setFormStateWithEmit(field.model, $event)"
                     />
                   </template>
diff --git a/packages/nc-gui/components/nc/form-builder/input/SelectBase.vue b/packages/nc-gui/components/nc/form-builder/input/SelectBase.vue
index af4c86e3e6..2e49662dad 100644
--- a/packages/nc-gui/components/nc/form-builder/input/SelectBase.vue
+++ b/packages/nc-gui/components/nc/form-builder/input/SelectBase.vue
@@ -4,6 +4,7 @@ const props = withDefaults(
     value: string
     disabled?: boolean
     dropdownMatchSelectWidth?: boolean
+    filterOption?: (base: NcProject) => boolean
   }>(),
   {
     dropdownMatchSelectWidth: true,
@@ -17,11 +18,13 @@ const vModel = useVModel(props, 'value', emits)
 const basesStore = useBases()
 
 const baseOptions = computed(() => {
-  return basesStore.basesList.map((base) => ({
-    label: base.title,
-    value: base.id,
-    meta: base.meta,
-  }))
+  return basesStore.basesList
+    .filter((base) => !props.filterOption || props.filterOption(base))
+    .map((base) => ({
+      label: base.title,
+      value: base.id,
+      meta: base.meta,
+    }))
 })
 </script>
 
@@ -31,10 +34,11 @@ const baseOptions = computed(() => {
     :disabled="disabled"
     :show-search="baseOptions.length > 4"
     allow-clear
+    :filter-option="(input, option) => antSelectFilterOption(input, option, ['data-label'])"
     placeholder="- Select base -"
     :dropdown-match-select-width="dropdownMatchSelectWidth"
   >
-    <a-select-option v-for="option of baseOptions" :key="option.value" :value="option.value">
+    <a-select-option v-for="option of baseOptions" :key="option.value" :value="option.value" :data-label="option.label">
       <div class="w-full flex gap-2 items-center" :data-testid="option.value">
         <div class="min-w-5 flex items-center justify-center">
           <GeneralProjectIcon :color="parseProp(option.meta).iconColor" size="small" />
diff --git a/packages/nc-gui/components/workspace/project/create/ManagedApp.vue b/packages/nc-gui/components/workspace/project/create/ManagedApp.vue
index 865fb860ba..80ce7645c7 100644
--- a/packages/nc-gui/components/workspace/project/create/ManagedApp.vue
+++ b/packages/nc-gui/components/workspace/project/create/ManagedApp.vue
@@ -149,6 +149,7 @@ const { formState, isLoading, submit } = useProvideFormBuilderHelper({
         equal: 'existing',
       },
       defaultValue: undefined,
+      filterOption: (base) => base && !base?.sandbox_master,
     },
     {
       type: FormBuilderInputType.Input,
diff --git a/packages/nocodb-sdk/src/lib/formBuilder/index.ts b/packages/nocodb-sdk/src/lib/formBuilder/index.ts
index ac08e85353..47cac67368 100644
--- a/packages/nocodb-sdk/src/lib/formBuilder/index.ts
+++ b/packages/nocodb-sdk/src/lib/formBuilder/index.ts
@@ -1,3 +1,5 @@
+import { BaseType } from "../Api";
+
 export enum FormBuilderInputType {
   Input = 'input',
   Textarea = 'textarea',
@@ -266,6 +268,7 @@ export interface FormBuilderSelectIntegrationElement
 export interface FormBuilderSelectBaseElement extends FormBuilderElementBase {
   type: FormBuilderInputType.SelectBase;
   defaultValue?: string | null;
+  filterOption?: (base: BaseType) => boolean;
 }
 
 /**