You can not merge it. Right click on it and try to shrink it to about 350MB.
Another solution: Um. 55GB (yes, GB) System Reserved Partition?! Solved
If your RE info did not change the windowsRE location to to globalroot yada yada
type> C:\Windows\System32\Reagentc /Setreimage /Path F:\Recovery\WindowsRE /Target C:\Windows
That command will register the windows recovery tools..
I also assume you have a lot of free space in that partition - you can then use a program "EaseUS Partition Master"
to resize partition 1 down to 450MB and then resize partition 2 to fill the new unused space created by resizing partition 1