Missing phrase " 'adv_gallery_nodelete'."

[mindbuster]

Im gettting an error when clicking the delete button with the "Do not delete image" option enabled when editing pics.

Could not find phrase 'adv_gallery_nodelete'.

No biggie but might be confusing for members.

What are the steps to add that phrase and what should it be called ?

If you'll add a phrase with a varname of 'adv_gallery_nodelete' and 'You must check the "Delete This $type" box to delete this $type.' for the text to your 'Front-End Error Messages' group then that should take care of the problem.