Overwrite connection string in Azure DevOps

I'm trying to create a release (DevOps) and all the appSettings overwritten but the connectionStrings is not overwritten.

<parameter name="connectionOne" defaultvalue="__EMPTY__" tags="">
    <parameterentry kind="XmlFile" scope="\\Web.config$" match="/configuration/connectionStrings/add[@name='connectionOne']/@connectionString" />
</parameter>