Ideally, there should be 3 months between the two long distances. In this way you can completely rebuild the shape.
If the time frame is tighter, then I would recommend putting the first 60% of the remaining training time in a basic block, advanced training and later competition-specific training should then be 30-35% and tapering makes up the remaining 5-10%.
Do not increase the volume too much at first, otherwise there is a risk of overtraining. In addition, it is essential to omit intensities above 80% (HRmax) in the first four weeks after the 1st long distance.
skin in!
krelli