Cannot purchase spellbook

[ksp4ce]

I cannot purchase the following spellbooks, they come up as 0gp in the shop

Rage
ProtectionField
Blizzard
MeteorStrike

Rage 4 50 8 1 1 10 0 0 0 77 250 82 350 87 500 100
ProtectionField 4 51 8 1 1 10 0 0 0 68 250 73 350 78 500 100
Blizzard 2 52 37 8 8 30 6 6 1 77 250 82 350 87 500 400
MeteorStrike 2 53 15 8 8 10 6 6 1 85 250 91 350 96 500 50


Even if changing the prices in the Database, it still isnt purchasable

 

[IceMan]

delete all the files in market sav folder

 

[ksp4ce]

delete all the files in market sav folder

I did that, I deleted from Market_Prices, Market_Saved and Market_Upg and they still weren't purchasable.