The getchaintips JSON-RPC returns multiple branches of the blockchain.
Chain tips can be in various statuses.
The active and valid-fork are already validated chains. There is a valid-header

valid-headers for a chain with valid headers whose corresponding blocks are stored locally, but which haven’t been fully validated

which I would like to turn into valid-fork. According to above info I have the blocks locally so I just need to invoke validation process.
Is there any RPC to perform that task? or any other way?