Help Adding new skill problem.

Hello, can someone tell me why i get this error?

[09:28:56] WARN: Recived Wrong Packet Data in Aquired Skill - id: 48000 level: 1
 for L2PcInstance:Dev[268440003]

Syntax of skill is

<skill id="48000" levels="1" name="Level Mastery">
        <set name="magicLvl" val="76" />
		<set name="operateType" val="P" />
		<set name="targetType" val="SELF" />
		<for>
				<mul stat="pvePhysDmg" val="1.50" /> <!-- Pve by 50% -->
				<mul stat="pveMagicalDmg" val="1.50" /> <!-- Magic PvE by 50% -->
				<mul stat="pvpPhysDmg" val="1.05" /> <!-- Magic PvP by 5% -->
				<mul stat="pvpMagicalDmg" val="1.05" /> <!-- Magic PvP by 5% -->
				<mul stat="maxHp" val="2.00" /> <!-- HP by 100% -->
				<mul stat="maxCp" val="1.75" /> <!-- CP by 75% -->
		</for>
	</skill>

I try to make it passive on Occupation skills. Thank you !