Whenever I have my company chocobo stabled, I can't use Mount Roulette because I get the error message "Unable to summon your chocobo while he is stabled"

Time: All Times
Frequency: Constant
World name: Adamantoise
Character name: Zebyxus Starshadow
NPC name: n/a
Monster name: n/a
Class/Level: BLM (50)
Party or solo: Both
In-game time: All times
Area and coordinates: All Areas