Help cant boost my nodes anymore

Hello i finished 2 différents towers with tier 15 maps full upgraded to get the 3 slots of boost. Towers are well completed but im not able to put the book of boosts in even if well completed the slots of the tower are always blocked when i put a New map in the slots appear but i cant go in anymore i got a n' error message who say map all ready consummed.

I think i forgot to put away 3 others book of boost when i completed a normal node maybe because of this ?

Please i need help i cant boost my nodes anymore !