diff --git a/packages/core/client/src/schema-component/antd/association-field/InternalPicker.tsx b/packages/core/client/src/schema-component/antd/association-field/InternalPicker.tsx
index afe85386bc..9f24de9620 100644
--- a/packages/core/client/src/schema-component/antd/association-field/InternalPicker.tsx
+++ b/packages/core/client/src/schema-component/antd/association-field/InternalPicker.tsx
@@ -106,7 +106,8 @@ export const InternalPicker = observer(
     const pickerProps = {
       size: 'small',
       fieldNames,
-      multiple: multiple !== false && ['o2m', 'm2m', 'mbm'].includes(collectionField?.interface),
+      multiple:
+        multiple === true ? true : multiple !== false && ['o2m', 'm2m', 'mbm'].includes(collectionField?.interface),
       association: {
         target: collectionField?.target,
       },