Do not lace the awning corner back on until the glue has set up completely.
How to repair awning fabric.
The absolute best option is made by eternabond.
Fabric awning repair can take on many forms from repairing holes and rips to replacing the entire mechanism of the awning.
Unroll the spring with a vise grip slide the spring out of the roller tube and roll the old fabric off of it.
Follow the instructions below to reinforce the stitches on the fabric awning so that it will last a long time.
This is strong enough to patch roofs on rvs or campers and does marvelous on awnings for all fabric types.
Roll the fabric up and reattach the legs before you put the awning back onto the rv.
Unlace the awning far enough that you can lift up the corner.
There are two options depending on your budget.
Follow the same procedure as for rips in the fabric body cutting your repair fabric long enough and wide enough to extend beyond the rip.
Insert the new awning into the channels on the roller tube and slide it all the way down to install it.
There is nothing wrong with the stitches already on the awning so there is no reason to remove them.
The longer answer is that you need to get quality repair tape for awnings and apply it properly.
Glue it in place from the underside pressing it well.