Question Re "Mechanical Errors"

I'm familiar with the concept and have re-submitted a few mistakes in the past . . .
but when PSA reclassifies a card, such as a new variation, can they be resubmitted as mechanical errors even though they were correct at the time?
My specific example is the 1963 Topps Peel-offs -- PSA now differentiates among blank back and instruction back -- can an unspecified slab now be resubbed as a mechanical error? If not, what is the procedure to have the slab corrected?
I realize I can call CS but thought someone might have a quick answer to share with the group.
but when PSA reclassifies a card, such as a new variation, can they be resubmitted as mechanical errors even though they were correct at the time?
My specific example is the 1963 Topps Peel-offs -- PSA now differentiates among blank back and instruction back -- can an unspecified slab now be resubbed as a mechanical error? If not, what is the procedure to have the slab corrected?
I realize I can call CS but thought someone might have a quick answer to share with the group.
Focusing on baseball “playing years” HOFers. My HOF Set; https://psacard.com/psasetregistry/baseball/hall-fame-sets/hall-fame-players-managers-owners-executives-pioneers-commissioners-umpires/publishedset/77755
Always plenty of PSA-graded cards in my ebay store -- https://ebay.com/str/thelumbercompanysportscards
Always plenty of PSA-graded cards in my ebay store -- https://ebay.com/str/thelumbercompanysportscards
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Comments
but why dont you call PSA for the correct info.
Collecting:
Brett Favre Master Set
Favre Ticket Stubs
Favre TD Reciever Autos
Football HOF Player/etc. Auto Set
Football HOF Rc's
Jeff