I bought a Trait Scroll from the Broker:

"Trait Scroll - Kelpari - Mermaid - M3 - R"

When I attempt to use the scroll on this pet--


--the initial popup reads--

"[Trait Scroll (Kelpari - Mermaid - M3 - R)] This will replace any Traits in the 0 Trait Slot with . If the 0 Trait Slot is empty, this will replace 1 random non-Restricted Visible Trait instead."

There is no 0 Trait Slot.

When I attempt to use the scroll anyhow, I get this error message--

"There was an Error! Philter failed to consume. Please try again."

I've attempted to use the Scroll multiple times, but the same thing keeps happening. Please advise.