Sweet Pete's Candy located in Downtown Jacksonville says its business is "still booming," despite the unexpected closure of Marcus Lemonis' MLG restaurant next door.

Sweet Pete's confirmed MLG's closure on Thursday, saying they didn't know why the restaurant closed.

"They were just a tenant," Sweet Pete's said in an Instagram message with First Coast Foodies/First Coast News. "Sweet Pete's is still booming! ... We're doing great!"

The Jacksonville Business Journal reported that MLG was last opened on Mother's Day and that it had a sign on its door that said "exciting changes coming."

READ MORE: Marcus Lemonis' MLG restaurant closes in Downtown Jacksonville after opening six months ago

MLG first opened at 400 N. Hogan St. on Nov. 23. Prior, the restaurant used to be the Candy Apple Cafe, which officially closed on Aug. 23 because of revenue losses due to extended repairs to the historic 1901 building.

Lemonis, the star of the popular CNBC reality show, "The Profit," opened MLG after he joined Sweet Pete's as a part-owner after the candy shop owners, Pete and Allison Behringer appeared on the show.

At this time, the reason behind MLG's closure is unknown, but a source with the Jacksonville Business Journal said Lemonis didn't want to invest any more money into the business.

READ MORE: A taste of the new MLG restaurant in Downtown Jacksonville

READ MORE: The Candy Apple Cafe permanently closes downtown Jacksonville restaurant