At the moment, Main account can be edited under Line Details > Financial dimensions when PR is created. There must be a way to hide/remove main account from being visible and/or editable for users when Purchase Requisition is created. This is not allowed using personalization. This is also not possible to restrict in security roles. It is overriding procurement category accounting distributions even if item posting main accounts have already been configured. When standard team license user goes there, he/she should be allowed to edit all financial dimensions EXCEPT Main account which is not financial dimension. This is causing major issues as PRs ends up posted in random main accounts.