All my questions are being "Deleted" for violating community guidelines by the same bots that scam you with the file. I swear- if it turns out the moderation team is scamming it's own site users (Not saying this is the case, but how does a scam 'bot' delete a question?)

I really don’t understand why that is

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -