In Poland if you signed a contract for a set period of time and there is no clause about breaking the contract early, you are on the hook for the entire duratio

In Poland if you signed a contract for a set period of time and there is no clause about breaking the contract early, you are on the hook for the entire duration of the contract. For rent specifically, you can arrange to have a mutual agreement with the landlord if you for example find a new tenant, but by law the landlord does not have to accept anything. Some contract also have punitive clauses in it, saying that you can break the contract at any point with 1 months notice, but you have to pay 3 months' worth of rent.