WBC President Mauricio Sulaiman made the call, saying the age gap between the fighters posed too big a risk. He didn't mince words about it either.
"The fight is not logical. We will not allow a 12-year-old girl to risk her health."
Romina's been in the ring since she was 6 and has racked up 50 amateur wins. Her power, discipline, and charisma have earned her the nickname "female Canelo." But the WBC thinks she needs more time before turning pro.
The planned debut was set to happen on the undercard of Esneidy Rodriguez vs. Wisuta Sririttidet in Veracruz. It stirred up quite a debate. Some folks applauded the WBC for protecting a minor. Others argued young Mexicans are tougher than ever and should get their shot.
Romina's dad didn't take the news well. He threatened Sulaiman, demanding the fight go ahead. But the WBC president stood firm.
"I will do everything possible to prevent it. Opening the door to children's fights can lead to tragic consequences."
Some people pointed to Pat Daly, who turned pro at 10 back in 1923 and cracked the world top 10 before he hit 17. But times have changed. The Voluntary Anti-Doping Association (VADA) says the human brain isn't fully developed before 14.
Romina's not letting this setback crush her dreams. She gets up at 5 AM every day to run and train before school.
"I wake up at 5 in the morning, I run, I train, I go to school... this is my life,"she said.
For now, "Bambita" will focus on starting secondary school in September. But her eyes are still on the prize – becoming a world champ and winning that WBC belt. The council says they'll keep supporting her amateur career and guide her responsibly.
This story shows how boxing walks a tightrope between nurturing young talent and protecting kids from harm. It's a debate that's far from over.