uniqueKey required false for multivalued id when indexing rich documents

[Furkan KAMACI]

I am new to Solr and try to index rich files. I have defined that at my
schema:

<field name="id" type="string" indexed="true" stored="true" required="true"
multiValued="false" />

and there is a line at my schema:

<uniqueKey>id</uniqueKey>

should I make it like that:

<uniqueKey required="false"></uniqueKey>

for my purpose?