There's no data on Silver Breath for Live EQ until 2013, where it currently lists the dispel component as "Slot 2: Dispel Beneficial (95% Chance)"
https://spells.eqresource.com/history.php?id=1480
There's also no data on the Abolish Enchantment clicky from Abashi's Rod of Disempowerment on live until the same date.
https://spells.eqresource.com/history.php?id=1792
Both spells have this change at this exact same date: 05/21/2014 - Slot 2 changed from 'Dispel Beneficial (0.9% Chance)' to 'Dispel Beneficial (95% Chance)'
Both spells show up as Cancel Magic(9) on both the archived spell data Mortdecai99 listed above and the spell data gathered from EQMac:
https://lucy.alkabor.com/spell_1480.html
It seems that the "Dispel Beneficial" component didn't exist until that date in 2014, where they swapped out the component and then changed the base value of the component, which was 9 for both spells from when they were using a simple dispel component, which is why it shows as being changed from a 0.9% chance to a 95% chance.
The ID for the Dispel Beneficial component is 950 which is waaay out of our era mixed in with a ton of spell components that did not exist until over a decade later in that ID number range. IDs for spell components that existed in Velious are roughly 0-119 from what I can see, with disciplines a bit further back behind mixed in with some Luclin components at 168-182. Everything past that is is just more Luclin, PoP, and <insert list of every expansion here> components.
So there should be no dispel on p99 that only dispels beneficial spells. The abashi clicky currently only dispels beneficial spells on P99 so that spell also needs to be reverted to a normal cancel magic component as well as any other spell that is using the out of era Dispel Beneficial component.