fix issue

templates/custom/select_dataset.tmpl

@@ -3,7 +3,11 @@
 <div class="inline {{if eq .cloudbraintype 0}} required {{end}} field" id="dataset-base">
     <label>{{.i18n.Tr "dataset.dataset"}}</label>
     <input type="hidden" name="attachment" :value="dataset_uuid">
-    <input type="text" :value="dataset_name" disabled>
+    {{if eq .cloudbraintype 0}}
+    <input class="disabled" type="text" :value="dataset_name" required>
+    {{else}}
+    <input class="disabled" type="text" :value="dataset_name">
+    {{end}}
     <el-button type="text" @click="dialogVisible = true" icon="el-icon-plus"> {{.i18n.Tr "dataset.select_dataset"}}</el-button>
     <el-dialog
     title="{{.i18n.Tr "dataset.select_dataset"}}"