Stains on WPC terrace decking

Hello everyone,

now that the days are getting warmer again, we want to put our market umbrella on our new WPC terrace. Unfortunately, I have already had bad experiences with this on a larch terrace. :eek: The umbrella is fixed with four concrete slabs. As a result, the terrace surface can no longer dry after a rain shower and leaves increasingly worse :):) and stains. Do you have any tips to prevent this, or do we have to accept it and treat the spot by cleaning or even sanding after dismantling the umbrella stand? (The slabs are very heavy, so constantly moving the umbrella is not an option) :p Many thanks in advance for the replies, :) Sunny greetings :)

I would put the umbrella stand under the WPC. That way only the umbrella sticks out and the problems are gone.