SunEnergy1 Racing is absent from this weekend’s Mobil 1 Sportscar Grand Prix at Canadian Tire Motorsport Park, following the dissolving of its partnership with Riley Motorsports.

Riley, which had run the Kenny Habul-owned operation since the start of the IMSA WeatherTech SportsCar Championship season, was reportedly notified earlier this week that its services would no longer be needed.

It comes following an eighth place class finish in GT Daytona for Thomas Jaeger, team owner Kenny Habul and Mikael Grenier, who was scheduled to drive the No. 75 Mercedes-AMG GT3 alongside Habul this weekend.

A reason for the team’s exit from GT Daytona competition is unclear, or whether Habul will return to WeatherTech Championship competition later this year.

Habul, who finished second in February’s Liqui-Moly Bathurst 12 Hour, meanwhile, is entered for this month’s Total 24 Hours of Spa, which marks the second round of the Intercontinental GT Challenge season.

The U.S.-based Australian is set to share driving duties of a HTP Motorsport-run Mercedes with Jaeger and Bernd Schneider, who drove for the Riley-run team at Detroit last month.