Not a problem. This happens with older 20s from time to time & even older 30s. Sounds like the mag's warped due to long term use. There are a few methods that worked well for me in the past. The best method is to put the mag in between 2 blocks of wood and press it in a vice. you turn the mag snug then do some gradual 1/4 turns. stopping, releasing, and checking progress. The low teck method is to put the mag on the floor and rest the balls of your stocking feet on the mag. Shift your body weight to the mag and back off a few times. if not enough shift then gently & carefully stand on it. If you need to jiggle up & down try that next. Just don't hop. I used both methods with perfect results on old 20s and have never damaged a mag.
If you have a vice you might want to give a quick clench to the narrow side of the mags too to ensure the magazine is a rectangle [] instead of a parallelogram <>. sometimes the mag incurs a "rhombusing" and you need to box it back to 90 degree angles, but I am confident the pressing/stomping alone should cure what ails you.