He and Viola Davis, recipient of the Cecil B. DeMille Award, will also be feted at a separate dinner event.
Both artists are BBMAs finalists this year.
The Victoria Police Cybercrime, Fraud, Scams and Online Safety Unit has been tapped to investigate the matter.
Morgan Wallen isn't the first artist to miss out on night of triumph.
The winner will be announced in December ahead of March's ceremony in London.
The show, saluting Bonnie Raitt, the Grateful Dead and more, will be broadcast in December.
The show is set to air on Thursday, Dec. 12 at 8:00 pm ET/PT on Fox and Fire TV Channels, and on-demand on Paramount+.
"Shout out to Shaboozey for your response to my fumble," he wrote.
From K-pop gossip to the star-studded afterparty in West Hollywood, here's what Billboard learned and overheard during the first-ever MAMA Awards ceremony in the States.
The duo also accepted the global sensation award at the ceremony.