More than one Character Booster not working on one character

[Draythereaver]

Date & Time: 02/14/2018 08:15 pm
Frequency: once
World name: Diablos
Character name: Ruby Radyx
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: Black Mage Lvl 60
Party or solo: Solo
In-game time:
Area and coordinates:
Housing:
Steps:
1. Bought second "tale of.." booster book to gain summoner class booster and shire set
2. Wouldn't let me use the second book
3.

I haven't seen any warnings saying one character can't use more than one booster book, I used the black mage book a couple weeks ago and now was hoping to use the summoner one as well. I submitted a question to the gm's on the game but was rerouted here for an answer. If I can't use more than one book on a character, can I send the book and coffer to my alt character?

Edit: so this is a repost, for some reason I got locked out of the last thread. Mirage Sniper answered that I can't use both at once but I'm not trying to. I used the Black Mage book weeks ago and am now trying to use the Summoner boost book but it isn't working, it keeps being interrupted

[Mholito]

Where were you when you tried to use it?