G13 flowering full of seeds

There is not enough information. From the image I would say Blurple light is to close and would be tough to control the heat or light stress.... If one Hermied because of stress then you need to figure out what caused that stress. If you can Identify that then you can remedy the stress causing effect and hopefully not have the same results with further versions of the cut you are having issues with. Now that being said it seems that the cut is prone to issues if stress is the culprit and may not be a strain you want to continue cultivating in your set up. Once harvested just make sure to clean up so as not to pollinate future runs. Now, it might not be how you wanted BUT, back in the day weed had seeds and it smoked and worked as it should. I wouldn't cull the crop because a plant has seeds. Figure it out, keep moving forward. Good luck.