You'll need to replace the adhesive to reattach the screen:

To ensure a good adhesive bond, thoroughly clean all adhesion surfaces.

Remove large chunks of adhesives with the flat edge of a spudger or tweezers.

Use high concentration isopropyl alcohol (>90%) to remove any remaining residue. Wipe in one direction with a lint-free cloth or coffee filter until all the adhesive residue is gone.

Allow any leftover isopropyl alcohol to completely evaporate before reassembly.

Apply strips of double-sided tape such as Tesa tape to the screen perimeter to reattach the screen.