Midsole separation

The midsole of my right cycling boot is separating from the upper. I will need some glue to fix it. They are old, around fifteen years old, but are in decent condition. It happened when I was pulling up on the pedal. Over time with the degradation of the glue and constant upward force, the upper has finally ripped apart from the midsole.

There are no metaphors in the post, no matter how hard you read between the midsole.