Absolutely yes; call Worthington locksmith right away. If the apartment has been previously rented, you should even demand evidence that the key change has been made. We know of many cases that show this is necessary thing to do. You must change that key as soon as you take possession of your home. It is surprising how many burglaries happen without violence immediately after the transfer of an apartment. The thieves simply had the key to the house and took advantage of their opportunity.