修复已选内容提示校验报错bug

src/views/operation/recommend/detail.vue

@@ -472,6 +472,7 @@ export default {
       }
       this.$message.success('选择成功！')
       this.dialogVisible = false
+      this.$refs.list[this.index].clearValidate('contentName')
     },
 
     // 批量选择