1995 Le Sabre Security Light Stays On

Luckily, the car will start without any problems. I would like to avoid any costly repairs since I have had so many in the past year and a half. Would having my key replaced be of any help? I have read other forums regarding bypassing the security system so this problem will not occur. Does the ignition drum assembly need replacing? I would like to resolve this problem before there are any future problems.