Largely agree with the others with one exception. Don’t put adhesive inside the channel. It will make future removal basically impossible.

Cut whatever adhesive you can see with a razor, slide the glass out of the channel, clean the channel and glass well, and then reinstall. Run a bead of silicone around the seam. It will be more than enough to hold the glass in place. That’s the same way stone countertops are installed - there usually isn’t glue between the countertop and the cabinets. The silicone/caulk beads are enough to hold it in place.

Things to keep in mind:

• it’s glass, so you’ll want to avoid bumping it into things. Put down thick towels/blankets in your work area and wherever you want to put it down. Be very wary of dinging the bottom on the floor/ceiling
• wear PPE. At a minimum leather shoes/boots, thicker pants that aren’t skin tight (no skinny jeans), long/heavy/baggy sleeves, leather work gloves, and safety glasses
• it’s going to be somewhat heavy. You could measure the panel size and plug it into an online calculator for a decent number. I suggest buying heavy duty suction cups that come with vacuum pumps. These will make moving the glass around a lot easier and they’re not that expensive

Good luck!