Same name fields conflict in parent/child documents

[zygisx]

Describe the bug
in parent/child related schemas if I import field with same name, deployment fails. Here is minimal example

To Reproduce

users.sd:
schema users {
    document users {
        field id type long {
            indexing: summary | attribute
        }
        field city_ref type reference<cities> {
            indexing: attribute
        }
    }

     import field city_ref.id as city_id {}
}

cities.sd:
schema cities {
    document cities {
        field id type int {
            indexing: summary | attribute
        }
    }
}

service.xml:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<services version="1.0">
  <container id="default" version="1.0">
    <search>
    </search>
    <document-api/>
    <accesslog type="disabled"/>
    <model-evaluation/>
  </container>

  <content id="content" version="1.0">
    <redundancy>1</redundancy>
    <documents>
      <document type="cities" mode="index" global="true" />
      <document type="users" mode="index" />
    </documents>
  </content>
</services>

gives error:

For schema 'users', field 'id':
Incompatible types. Expected long for attribute 'id', got int.

So seems users.id and cities.id fields conflicting. If i remove this line import field city_ref.id as city_id {} deployment completes without error.

Expected behavior
I expect that fields would not conflict.

Environment (please complete the following information):

• Infrastructure: self-hosted / docker

Vespa version
8.458.13

Additional context
Slack thread:
https://vespatalk.slack.com/archives/C01QNBPPNT1/p1736246549128649