Typo fix

src/server/game/Spells/Spell.cpp

@@ -4817,7 +4817,7 @@ SpellCastResult Spell::CheckCast(bool strict)
 
     // Check global cooldown
     if (strict && !(_triggeredCastFlags & TRIGGERED_IGNORE_GCD) && HasGlobalCooldown())
-        return m_spellInfo->HasAttribute(SPELL_ATTR0_DISABLED_WHILE_ACTIVE) ? SPELL_FAILED_NOT_READY : SPELL_FAILED_DONT_REPORT;
+        return !m_spellInfo->HasAttribute(SPELL_ATTR0_DISABLED_WHILE_ACTIVE) ? SPELL_FAILED_NOT_READY : SPELL_FAILED_DONT_REPORT;
 
     // only triggered spells can be processed an ended battleground
     if (!IsTriggered() && m_caster->GetTypeId() == TYPEID_PLAYER)