Leaving a pedal in a cross threaded state
At this point the damage is done and the only options are to leave it as is or remove the pedal and heli-coil the crank arm. There are a few scenarios that can play out in this situation. The worst case is the pedal backs out unexpectedly, you loose control, crash and get hurt. I would think this unlikely as it has been like this for a year. I would use some Loctite 290 applied to the exposed end of the pedal axle. This type of product is a wicking compound. It will travel down the threads of the mounted pedal and lock it in place. If you are lucky the pedal won't back-out and it won't be an issue until the pedal or crank needs replacement. At that point the pedal threads are likely destroyed. If you decide to heli-coil the crank arm you could do it yourself, how ever the cost of the drill,tap and coils make it an expensive repair. It is likely more cost effective to have a local shop handle it.